共查询到20条相似文献,搜索用时 375 毫秒
1.
José Antonio Campoy David Ruiz José Egea David Jasper G. Rees Jean Marc Celton Pedro Martínez-Gómez 《Plant Molecular Biology Reporter》2011,29(2):404-410
Time of flowering was studied during 3 years in a BC1 apricot progeny of 73 seedlings derived from a cross between the F1
selection “Z506-07” (“Orange Red” × “Currot”) and the Spanish cultivar “Currot”. Results indicated a quantitative inheritance
of flowering time in apricot with an influence of juvenility and environmental conditions (chill accumulation) on the evaluation
and expression of this trait. Genetic maps consisting of 11 linkage groups for both parents representing the eight chromosomes
of apricot were developed using 46 apricot and peach simple sequence repeat (SSR-microsatellites) markers and were used for
the identification of quantitative trait loci (QTL). QTL analysis for flowering time allowed the identification of one significant
QTL on the linkage group 5 (G5) of “Z506-07”, and explaining most of the phenotypic variation. Two microsatellite loci (UDAp-423r
and AMPA-105) were found to be tightly linked to this important agronomic trait. Finally, we discuss the stability of the
QTL described during the 3 years of the study and the development of efficient marker-assisted selection strategies applied
to apricot and other Prunus breeding programs. 相似文献
2.
Sophie Castède José Antonio Campoy Lo?ck Le Dantec José Quero-García Teresa Barreneche Bénédicte Wenden Elisabeth Dirlewanger 《PloS one》2015,10(11)
The timing of flowering in perennial plants is crucial for their survival in temperate climates and is regulated by the duration of bud dormancy. Bud dormancy release and bud break depend on the perception of cumulative chilling during endodormancy and heat during the bud development. The objectives of this work were to identify candidate genes involved in dormancy and flowering processes in sweet cherry, their mapping in two mapping progenies ‘Regina’ × ‘Garnet’ and ‘Regina’ × ‘Lapins’, and to select those candidate genes which co-localized with quantitative trait loci (QTLs) associated with temperature requirements for bud dormancy release and flowering. Based on available data on flowering processes in various species, a list of 79 candidate genes was established. The peach and sweet cherry orthologs were identified and primers were designed to amplify sweet cherry candidate gene fragments. Based on the amplified sequences of the three parents of the mapping progenies, SNPs segregations in the progenies were identified. Thirty five candidate genes were genetically mapped in at least one of the two progenies and all were in silico mapped. Co-localization between candidate genes and QTLs associated with temperature requirements and flowering date were identified for the first time in sweet cherry. The allelic composition of the candidate genes located in the major QTL for heat requirements and flowering date located on linkage group 4 have a significant effect on these two traits indicating their potential use for breeding programs in sweet cherry to select new varieties adapted to putative future climatic conditions. 相似文献
3.
QTL analysis of fruit components in the progeny of a Rennell Island Tall coconut (Cocos nucifera L.) individual 总被引:2,自引:0,他引:2
Baudouin L Lebrun P Konan JL Ritter E Berger A Billotte N 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2006,112(2):258-268
We investigated the genetic factors controlling fruit components in coconut by performing QTL analyses for fruit component
weights and ratios in a segregating progeny of a Rennell Island Tall genotype. The underlying linkage map of this population
was already established in a previous study, as well as QTL analyses for fruit production, which were used to complement our
results. The addition of 53 new markers (mainly SSRs) led to minor amendments in the map. A total of 52 putative QTLs were
identified for the 11 traits under study. Thirty-four of them were grouped in six small clusters, which probably correspond
to single pleiotropic genes. Some additional QTLs located apart from these clusters also had relatively large effects on the
individual traits. The QTLs for fruit component weight, endosperm humidity and fruit production were found at different locations
in the genome, suggesting that efficient marker-assisted selection for yield can be achieved by selecting QTLs for the individual
components. The detected QTLs descend from a genotype belonging to the “Pacific” coconut group. Based on the known molecular
and phenotypic differences between “Pacific” and “Indo-Atlantic” coconuts, we suggest that a large fraction of coconut genetic
diversity is still to be investigated by studying populations derived from crosses between these groups.
Electronic Supplementary Material Supplementary material is available for this article at and is accessible for authorized users. 相似文献
4.
Zheng X Wu JG Lou XY Xu HM Shi CH 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2008,116(3):335-342
Investigations to identify quantitative trait loci (QTLs) governing cooking quality traits including amylose content, gel
consistency and gelatinization temperature (expressed by the alkali spread value) were conducted using a set of 241 RIL populations
derived from an elite hybrid cross of “Zhenshan 97” × “Minghui 63” and their reciprocal backcrosses BC1F1 and BC2F1 populations in two environments. QTLs and QTL × environment interactions were analyzed by using the genetic model with endosperm
and maternal effects and environmental interaction effects on quantitative traits of seed in cereal crops. The results suggested
that a total of seven QTLs were associated with cooking quality of rice, which were subsequently mapped to chromosomes 1,
4 and 6. Six of these QTLs were also found to have environmental interaction effects. 相似文献
5.
6.
Andrea Michaela Bauer F. Hoti M. von Korff K. Pillen J. Léon M. J. Sillanpää 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2009,119(1):105-123
A common difficulty in mapping quantitative trait loci (QTLs) is that QTL effects may show environment specificity and thus
differ across environments. Furthermore, quantitative traits are likely to be influenced by multiple QTLs or genes having
different effect sizes. There is currently a need for efficient mapping strategies to account for both multiple QTLs and marker-by-environment
interactions. Thus, the objective of our study was to develop a Bayesian multi-locus multi-environmental method of QTL analysis.
This strategy is compared to (1) Bayesian multi-locus mapping, where each environment is analysed separately, (2) Restricted
Maximum Likelihood (REML) single-locus method using a mixed hierarchical model, and (3) REML forward selection applying a
mixed hierarchical model. For this study, we used data on multi-environmental field trials of 301 BC2DH lines derived from a cross between the spring barley elite cultivar Scarlett and the wild donor ISR42-8 from Israel. The
lines were genotyped by 98 SSR markers and measured for the agronomic traits “ears per m2,” “days until heading,” “plant height,”
“thousand grain weight,” and “grain yield”. Additionally, a simulation study was performed to verify the QTL results obtained
in the spring barley population. In general, the results of Bayesian QTL mapping are in accordance with REML methods. In this
study, Bayesian multi-locus multi-environmental analysis is a valuable method that is particularly suitable if lines are cultivated
in multi-environmental field trials.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
7.
Apple tree architecture is naturally very diverse, but for fruit production, certain tree habits are more desirable than others.
Here we describe the results of a QTL analysis performed to study the genetic control of growth traits in apple. This was
carried out on the progeny of a cross between two apple cultivars of contrasting tree architectures. “Telamon” has a columnar
tree form and “Braeburn” has a more standard, “normal” growth habit. The growth traits were measured on the F
1 seedlings of the Telamon × Braeburn population for two consecutive years of growth on own roots and for the first year
of growth on M9 rootstock. QTL analysis was carried out using either the Kruskal–Wallis method or the Multiple QTL Method.
For all but one growth characteristic, significant QTLs were detected. A major cluster of QTLs was located in the Co gene region of “Telamon”, confirming the major influence of the Co gene on tree architecture, although this influence changed as the plant material aged and was generally more pronounced for
rootstock-grown plants. Additional QTL results suggest the occurrence of genes with pleiotropic effects on tree architecture.
The observed QTL instability over different years and for different root systems indicates that the genetic control of tree
architecture is largely influenced by environmental factors and probably changes as the tree matures. Finally, a major influence
of the root system on all the traits determining tree architecture was clearly demonstrated. 相似文献
8.
H. Kuittinen M. J. Sillanpää O. Savolainen 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1997,95(4):573-583
We have mapped QTLs (quantitative trait loci) for an adaptive trait, flowering time, in a selfing annual, Arabidopsis thaliana. To obtain a mapping population we made a cross between an early-summer, annual strain, Li-5, and an individual from a late
over-wintering natural population, Naantali. From the backcross to Li-5 298 progeny were grown, of which 93 of the most extreme
individuals were genotyped. The data were analysed with both interval mapping and composite interval mapping methods to reveal
one major and six minor QTLs, with at least one QTL on each of the five chromosomes. The QTL on chromosome 4 was a major one
with an effect of 17.3 days on flowering time and explaining 53.4% of the total variance. The others had effects of at most
6.5 days, and they accounted for only small portions of the variance. Epistasis was indicated between one pair of the QTLs.
The result of finding one major QTL and little epistasis agrees with previous studies on flowering time in Arabidopsis thaliana and other species. That several QTLs were found was expected considering the large number of possible candidate loci. In
the light of the suggested genetic models of gene action at the candidate loci, epistasis was to be expected. The data showed
that major QTLs for adaptive traits can be detected in non-domesticated species.
Received: 15 January 1997/Accepted: 21 February 1997 相似文献
9.
Zihong Ye Junmin Wang Qian Liu Minzhou Zhang Keqin Zou Xianshu Fu 《Journal of Plant Biology》2009,52(3):259-267
Using mixed-model-based composite interval mapping and conditional statistical methods, we studied quantitative trait loci
(QTLs) with epistatic effects and QTLs by environment interaction effects for rice seed set percent (SSP), filled grain number
per plant (FGP), and panicle length (PL). A population of 241 recombinant inbred lines was used which was derived from a cross
between “Zhenshan 97” and “Minghui 63.” Its linkage map included 221 molecular markers. Our QTL analysis detected 28, 25,
and 32 QTLs for SSP, FGP, and PL, respectively. Each QTL explained 1.37%∼13.19% of the mean phenotypic variation. A comparison
of conventional and conditional mapping provided information about the genetic control system involved in the synthetic process
of SSP, FGP, and PL at the level of individual QTLs. Conditional QTLs with reduced (or increased) effects were identified
for SSP, which were significantly influenced by FGP or PL. Some QTLs could express independently for the given traits, thereby
providing possibilities for simultaneous improvement of SSR and PL, and SSR and FGP. Epistasis was more sensitive to environmental
conditions than were additive effects. 相似文献
10.
Molecular detection of QTLs for agronomic and quality traits in a doubled haploid population derived from two Canadian wheats (Triticum aestivum L.) 总被引:13,自引:0,他引:13
Huang XQ Cloutier S Lycar L Radovanovic N Humphreys DG Noll JS Somers DJ Brown PD 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2006,113(4):753-766
Development of high-yielding wheat varieties with good end-use quality has always been a major concern for wheat breeders. To genetically dissect quantitative trait loci (QTLs) for yield-related traits such as grain yield, plant height, maturity, lodging, test weight and thousand-grain weight, and for quality traits such as grain and flour protein content, gluten strength as evaluated by mixograph and SDS sedimentation volume, an F1-derived doubled haploid (DH) population of 185 individuals was developed from a cross between a Canadian wheat variety “AC Karma” and a breeding line 87E03-S2B1. A genetic map was constructed based on 167 marker loci, consisting of 160 microsatellite loci, three HMW glutenin subunit loci: Glu-A1, Glu-B1 and Glu-D1, and four STS-PCR markers. Data for investigated traits were collected from three to four environments in Manitoba, Canada. QTL analyses were performed using composite interval mapping. A total of 50 QTLs were detected, 24 for agronomic traits and 26 for quality-related traits. Many QTLs for correlated traits were mapped in the same genomic regions forming QTL clusters. The largest QTL clusters, consisting of up to nine QTLs, were found on chromosomes 1D and 4D. HMW glutenin subunits at Glu-1 loci had the largest effect on breadmaking quality; however, other genomic regions also contributed genetically to breadmaking quality. QTLs detected in the present study are compared with other QTL analyses in wheat. 相似文献
11.
Salt tolerance in Lycopersicon spp. VII. Pleiotropic action of genes controlling earliness on fruit yield 总被引:1,自引:0,他引:1
A. J. Monforte M. J. Asíns E. A. Carbonell 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1999,98(3-4):593-601
The change from vegetative to reproductive development (earliness) in Lycopersicon chesmannii line L2 was delayed for 20 weeks when compared to other Lycopersicon species under greenhouse conditions. The interspecific hybrid of L. chesmannii L2 and L. esculentum E9, a cherry tomato cultivar, also showed this delay in reproductive development. The distribution of this character in the
F2-derived population showed a bimodal shape, plants could be scored easily as “early” or “late” in two nutrient conditions
(optimum and high salinity). A QTL with major effects on earliness was detected in salinity, which explained 35.6% of the
phenotypic variation. The effect of this QTL greatly diminished under control conditions, indicating differences in the genetic
control of earliness between treatments. ACC synthase or phytochrome B2 are the products of candidate genes for such a major
QTL. Other QTLs with minor effects, and epistatic interactions, are also involved in earliness under both conditions. A “late”
F2 subpopulation yielded twice as much as an “early” F2; conversely, “early” plants were taller than “late” plants, regardless of the treatment. QTL analysis, carried out in both
subpopulations, showed that yield differences may be explained by chesmannii alleles showing negative additive effects at some QTLs only in the “early” subpopulation. The effect of population subdivision
on QTL analysis was investigated by computer simulations to show sample-size or random effects; thus, important pleiotropic
or regulatory effects of genes controlling earliness on yield that affect QTL analysis, have been reveiled. Therefore alleles
controlling earliness in L. chesmannii have to be taken into account for a more efficient utilization of the genetic resources of this species.
Received: 30 June 1998 / Accepted: 31 August 1998 相似文献
12.
Lorenzo Barchi Véronique Lefebvre Anne-Marie Sage-Palloix Sergio Lanteri Alain Palloix 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2009,118(6):1157-1171
A QTL analysis was performed to determine the genetic basis of 13 horticultural traits conditioning yield in pepper (Capsicum annuum). The mapping population was a large population of 297 recombinant inbred lines (RIL) originating from a cross between the
large-fruited bell pepper cultivar ‘Yolo Wonder’ and the small-fruited chilli pepper ‘Criollo de Morelos 334’. A total of
76 QTLs were detected for 13 fruit and plant traits, grouped in 28 chromosome regions. These QTLs explained together between
7% (internode growth time) and 91% (fruit diameter) of the phenotypic variation. The QTL analysis was also performed on two
subsets of 141 and 93 RILs sampled using the MapPop software. The smaller populations allowed for the detection of a reduced
set of QTLs and reduced the overall percentage of trait variation explained by QTLs. The frequency of false positives as well
as the individual effect of QTLs increased in reduced population sets as a result of reduced sampling. The results from the
QTL analysis permitted an overall glance over the genetic architecture of traits considered by breeders for selection. Colinearities
between clusters of QTLs controlling fruit traits and/or plant development in distinct pepper species and in related solanaceous
crop species (tomato and eggplant) suggests that shared mechanisms control the shape and growth of different organs throughout
these species. 相似文献
13.
Ergon A Fang C Jørgensen Ø Aamlid TS Rognli OA 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2006,112(2):232-242
The “BF14/16×HF2/7” mapping population of meadow fescue (Festuca pratensis Huds.) was characterised for number of panicles produced by non-vernalised plants in the field, vernalisation requirement
(number of weeks at 6°C and 8 h photoperiod), as well as days to heading, number of panicles and proportion of shoots heading
after a 12 weeks vernalisation treatment. Quantitative trait loci (QTLs) were identified and compared to QTLs and genes related
to the induction of flowering in cereals and grasses. A region on chromosome 1F affected days to heading and the proportion
of shoots heading. Chromosome 4F appeared to have several genes with a strong effect on vernalisation requirement. The strongest
effects were located in the proximal end of 4F and may correspond to the earliness per se (eps) QTL eps6L.2 in barley and
a heading time QTL in perennial ryegrass. A part of the meadow fescue orthologue of VRN1 was sequenced and mapped to another region of 4F that also had a strong effect on vernalisation requirement. The proximal
end of chromosome 5F had QTLs for days to heading and proportion of heading shoots. Syntenic regions in wheat and barley contain
eps-loci. A QTL for number of panicles in the field and a QTL for proportion of heading shoots were present on chromosome
6. A region on 7F affected the variation in number of panicles among plants without a vernalisation requirement, and is syntenic
to regions in perennial ryegrass, barley and rice containing orthologues of Arabidopsis thaliana
CO. 相似文献
14.
Guorong Zhang Audrey M. Sebolt Suneth S. Sooriyapathirana Dechun Wang Marco CAM Bink James W. Olmstead Amy F. Iezzoni 《Tree Genetics & Genomes》2010,6(1):25-36
Maximizing fruit size is critical for profitable sweet cherry (Prunus avium L.) production. Yet, despite its importance, little is known about the genetic control of fruit size. The objective of this
study was to identify quantitative trait loci (QTLs) for fruit size and two essential components of fruit size, mesocarp cell
number and size. This study utilized a double pseudo-testcross population derived from reciprocal crosses between a sweet
cherry cultivar with ~8 g fruit, “Emperor Francis” (EF), and a wild forest sweet cherry selection with ~2 g fruit, “New York
54” (NY). A total of 190 F1 progeny previously utilized for the construction of the linkage maps were evaluated in 2006 and 2007 for fruit weight, length,
and diameter; mesocarp cell number and length; and pit length and diameter. In 2008, a subset of this population was again
evaluated for fruit weight. Correlation analysis revealed that the three fruit size traits were highly correlated with each
other, and mesocarp cell number, not cell length, was correlated with fruit size. Three QTLs were identified for each fruit
size trait, and one QTL was identified for mesocarp cell number. Fruit size QTLs were found on linkage group 2 on the EF map
(EF 2) and linkage groups 2 and 6 on the NY map (NY 2 and NY 6). On EF 2, the cell number QTL clustered with the fruit size
QTL, suggesting that the underlying basis of the fruit size increase associated with this QTL was an increase in mesocarp
cell number. On NY 6, pit length and diameter QTLs clustered with those for fruit size, suggesting that the underlying morphological
basis of this fruit size QTL is the difference in pit size. 相似文献
15.
E Dirlewanger J Quero-García L Le Dantec P Lambert D Ruiz L Dondini E Illa B Quilot-Turion J-M Audergon S Tartarini P Letourmy P Arús 《Heredity》2012,109(5):280-292
The present study investigates the genetic determinism of flowering and maturity dates,
two traits highly affected by global climate change. Flowering and maturity dates were
evaluated on five progenies from three Prunus species, peach, apricot and sweet
cherry, during 3–8 years. Quantitative trait locus (QTL) detection was performed
separately for each year and also by integrating data from all years together. High
heritability estimates were obtained for flowering and maturity dates. Several QTLs for
flowering and maturity dates were highly stable, detected each year of evaluation,
suggesting that they were not affected by climatic variations. For flowering date, major
QTLs were detected on linkage groups (LG) 4 for apricot and sweet cherry and on LG6 for
peach. QTLs were identified on LG2, LG3, LG4 and LG7 for the three species. For maturity
date, a major QTL was detected on LG4 in the three species. Using the peach genome
sequence data, candidate genes underlying the major QTLs on LG4 and LG6 were investigated
and key genes were identified. Our results provide a basis for the identification of genes
involved in flowering and maturity dates that could be used to develop cultivar ideotypes
adapted to future climatic conditions. 相似文献
16.
QTL mapping for plant-height traits has not been hitherto reported in high-oil maize. A high-oil maize inbred ‘GY220’ was
crossed with two dent maize inbreds (‘8984’ and ‘8622’) to generate two connected F2:3 populations. Four plant-height traits were evaluated in 284 and 265 F2:3 families. Single-trait QTL mapping and multiple-trait joint QTL mapping was used to detect QTLs for the traits and the genetic
relationship between plant height (PH) and two other plant-height traits. A total of 28 QTLs and 12 pairs of digenic interactions
among detected QTLs for four traits were detected in the two F2:3 families. Only one marker was shared between the two populations. Joint analysis of PH with ear height (EH) and PH with top
height (TH) detected 32 additional QTLs. Our results showed that QTL detection for PH was dependent on the genetic background
of dent corn inbreds. Multiple-trait joint QTL analysis could increase the number of detected QTLs. 相似文献
17.
Madoka Y Kashiwagi T Hirotsu N Ishimaru K 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2008,116(5):603-612
Rice (Oryza sativa L.) chromosome segment substitution lines (CSSLs), in which chromosomal segments of the Indian landrace “Kasalath” replace
the corresponding endogenous segments in the genome of the Japanese premium rice “Koshihikari”, are available and together
cover the entire genome. Chromosome regions affecting a trait (CRATs) can be identified by comparison of phenotypes with genotypes of CSSLs. We detected 99 CRATs for 15 agronomic
or morphological traits. “Kasalath” had positively acting alleles in 53 CRATs. Its CRATs increased panicle number per plant
by up to 23.3%, grain number per panicle by up to 30.8%, and total grain number by up to 15.1%, relative to “Koshihikari”.
CRATs were identified for grain size (grain thickness and width), with positive effects of about 5.0%. A CRAT on chromosome 8
almost doubled the weight of roots in uppermost soil layers compared to “Koshihikari”. Additionally, “Kasalath” possessed
CRATs for higher lodging resistance (reduction in plant height and increase in stem diameter). In some cases, multiple CRATs
were detected in the same chromosome regions. Therefore, CSSLs with these chromosome segments might be useful breeding materials
for the simultaneous improvement of multiple traits. Five CRATs, one for plant height on chromosome 1, one for stem diameter
on chromosome 8, and three for heading date on chromosomes 6, 7, and 8 overlapped with the corresponding QTLs that already
had been mapped with back-crossed inbred lines of “Nipponbare” and “Kasalath”. In both “Koshihikari” CRATs and “Nipponbare”
QTLs, “Kasalath” had similar effects.
Both Y. Madoka and T. Kashiwagi have contributed equally to this article. 相似文献
18.
QTL Mapping for Frond Length and Width in Laminaria japonica Aresch (Laminarales, Phaeophyta) Using AFLP and SSR Markers 总被引:1,自引:0,他引:1
Fuli Liu Zhanru Shao Haining Zhang Jidong Liu Xiuliang Wang Delin Duan 《Marine biotechnology (New York, N.Y.)》2010,12(4):386-394
In Laminaria japonica Aresch breeding practice, two quantitative traits, frond length (FL) and frond width (FW), are the most important phenotypic
selection index. In order to increase the breeding efficiency by integrating phenotypic selection and marker-assisted selection,
the first set of QTL controlling the two traits were determined in F2 family using amplified fragment length polymorphism (AFLP) and simple sequence repeat (SSR) markers. Two prominent L. japonicas inbred lines, one with “broad and thin blade” characteristics and another with “long and narrow blade” characteristics, were
applied in the hybridization to yield the F2 mapping population with 92 individuals. A total of 287 AFLP markers and 11 SSR markers were used to construct a L. japonica genetic map. The yielded map was consisted of 28 linkage groups (LG) named LG1 to LG28, spanning 1,811.1 cM with an average
interval of 6.7 cM and covering the 82.8% of the estimated genome 2,186.7 cM. While three genome-wide significant QTL were
detected on LG1 (two QTL) and LG4 for “FL,” explaining in total 42.36% of the phenotypic variance, two QTL were identified
on LG3 and LG5 for the trait “FW,” accounting for the total of 36.39% of the phenotypic variance. The gene action of these
QTL was additive and partially dominant. The yielded linkage map and the detected QTL can provide a tool for further genetic
analysis of two traits and be potential for maker-assisted selection in L. japonica breeding. 相似文献
19.
Ralf Uptmoor Tobias Schrag Hartmut Stützel Elisabeth Esch 《Molecular breeding : new strategies in plant improvement》2008,21(2):205-216
Studying quantitative traits is complicated due to genotype by environment interactions. One strategy to overcome these difficulties
is to combine quantitative trait loci (QTL) and ecophysiological models, e.g. by identifying QTLs for the response curves
of adaptive traits to influential environmental factors. A B. oleracea DH-population segregating for time to flowering was cultivated at different temperature regimes. Composite interval mapping
was carried out on the three parameters of a model describing time to flowering as a function of temperature, i.e. on the
intercept and slope of the response of time to floral induction to temperature and on the duration from transition to flowering.
The additive effects of QTLs detected for the parameters have been used to estimate time to floral induction and flowering
in the B. oleracea DH-population. The combined QTL and crop model explained 66% of the phenotypic variation for time to floral induction and
56% of the phenotypic variation for time to flowering. Estimation of time to floral induction and flowering based on environment
specific QTLs explained 61 and 41% of the phenotypic variation. Results suggest that flowering time can be predicted effectively
by coupling QTL and crop models and that using crop modelling tools for QTL analysis increases the power of QTL detection. 相似文献
20.
Yadav RS Bidinger FR Hash CT Yadav YP Yadav OP Bhatnagar SK Howarth CJ 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2003,106(3):512-520
A mapping population of 104 F(3) lines of pearl millet, derived from a cross between two inbred lines H 77/833-2 x PRLT 2/89-33, was evaluated, as testcrosses on a common tester, for traits determining grain and stover yield in seven different field trials, distributed over 3 years and two seasons. The total genetic variation was partitioned into effects due to season (S), genotype (G), genotype x season interaction (G x S), and genotype x environment-within-season interaction [G x E(S)]. QTLs were determined for traits for their G, G x S, and G x E(S) effects, to assess the magnitude and the nature (cross over/non-crossover) of environmental interaction effects on individual QTLs. QTLs for some traits were associated with G effects only, while others were associated with the effects of both G and G x S and/or G, G x S and G x E(S) effects. The major G x S QTLs detected were for flowering time (on LG 4 and LG 6), and mapped to the same intervals as G x S QTLs for several other traits (including stover yield, harvest index, biomass yield and panicle number m(-2)). All three QTLs detected for grain yield were unaffected by G x S interaction however. All three QTLs for stover yield (mapping on LG 2, LG 4 and LG 6) and one of the three QTLs for grain yield (mapping on LG 4) were also free of QTL x E(S) interactions. The grain yield QTLs that were affected by QTL x E(S) interactions (mapping on LG 2 and LG 6), appeared to be linked to parallel QTL x E(S) interactions of the QTLs for panicle number m(-2) on (LG 2) and of QTLs for both panicle number m(-2) and harvest index (LG 6). In general, QTL x E(S) interactions were more frequently observed for component traits of grain and stover yield, than for grain or stover yield per se. 相似文献