共查询到20条相似文献,搜索用时 31 毫秒
1.
P. Kaló G. Endre L. Zimányi G. Csanádi G. B. Kiss 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2000,100(5):641-657
An improved genetic map of diploid (2n=2x=16) alfalfa has been developed by analyzing the inheritance of more than 800 genetic
markers on the F2 population of 137 plant individuals. The F2 segregating population derived from a self-pollinated F1 hybrid individual of the cross Medicago sativa ssp. quasifalcata ×Medicago sativa ssp. coerulea. This mapping population was the same one which had been used for the construction of our previous alfalfa genetic map. The
genetic analyses were performed by using maximum-likelihood equations and related computer programs. The improved genetic
map of alfalfa in its present form contains 868 markers (four morphological, 12 isozyme, 26 seed protein, 216 RFLP, 608 RAPD
and two specific PCR markers) in eight linkage groups. Of the markers 80 are known genes, including 2 previously cytologically
localized genes, the rDNA and the β-tubulin loci. The genetic map covers 754 centimorgans (cM) with an average marker density
of 0.8/cM. The correlation between the physical and genetic distances is about 1000–1300 kilobase pairs per centiMorgan. In
this map, the linkage relationships of some markers on linkage groups 6, 7, and 8 are different from the previously published
one. The cause of this discrepancy was that the genetic linkage of markers displaying distorted segregation (characterized
by an overwhelming number of heterozygous individuals) had artificially linked genetic regions that turned out to be unlinked.
To overcome the disadvantageous influence of the excess number of heterozygous genotypes on the recombination fractions, we
used recently described maximum-likelihood formulas and colormapping, which allowed us to exclude the misleading linkages
and to estimate the genetic distances more precisely.
Received: 19 October 1998 / Accepted: 15 April 1999 相似文献
2.
Barbara Weiffenbach Rebecca G. Bagley Kathleen Falls JoAnn Dubois Craig Hyser Diane Storvick Paul Schultz Jerry R. Mendell Eric C. B. Millner Stephen J. Jacobsen Robert C. Griggs 《Mammalian genome》1992,3(3):143-150
Mapping the long arm of Chromosome (Chr) 4 has assumed medical relevance with the establishment of linkage of facioscapulohumeral muscular dystrophy (FSHD) to distal 4q markers. We have constructed a multipoint linkage map using DNA markers that map to the long arm of Chr 4. Segregation data were collected for 17 DNA markers on the multigenerational CEPH mapping families, and data for one marker were taken from the published CEPH database. Genotypic information for six of these markers was also collected from a set of 24 families that exhibited inheritance of FSHD. Multipoint analyses allowed us to construct a map of 12 loci, connecting two previously separate linkage groups. Significant sexspecific differences in recombination were found for some genetic intervals. Four loci from the distal region of this map showed linkage with FSHD. A map using these terminal markers gave the strongest support for FSHD in the most distal position over all other possible positions.
Offprint requests to: B. Weiffenbach 相似文献
3.
A genetic linkage map of markers for the short arm of human chromosome 8 has been constructed with 14 polymorphic DNA markers on the basis of genotypes obtained in 40 CEPH reference families. This unbroken map spans 45 cM in males and 79 cM in females. The 14 markers include three genes, MSR, LPL, and NEFL, and one anonymous DNA segment that were previously assigned to chromosome 8. The other 10 marker had been isolated from a chromosome 8-specific cosmid library and physically localized to chromosomal bands by fluorescence in situ hybridization. The order of loci determined by genetic linkage was consistent with their physical locations. This map will facilitate efficient linkage studies of human genetic diseases that may be segregating on chromosome 8p and will provide anchor points for development of high-resolution maps for this chromosomal region. 相似文献
4.
M. M. Nachit I. Elouafi A. Pagnotta A. El Saleh E. Iacono M. Labhilili A. Asbati M. Azrak H. Hazzam D. Benscher M. Khairallah J.-M. Ribaut O. A. Tanzarella E. Porceddu M. E. Sorrells 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2001,102(2-3):177-186
Durum wheat (Triticum turgidum L. var. durum) is an economically and nutritionally important cereal crop in the Mediterranean region. To further our understanding
of durum genome organization we constructed a durum linkage map using restriction fragment length polymorphisms (RFLPs), simple
sequence repeats (SSRs) known as Gatersleben wheat microsatellites (GWMs), amplified fragment length polymorphisms (AFLPs),
and seed storage proteins (SSPs: gliadins and glutenins). A population of 110 F9 recombinant inbred lines (RILs) was derived from an intraspecific cross between two durum cultivars, Jennah Khetifa and Cham
1. The two parents exhibit contrasting traits for resistance to biotic and abiotic stresses and for grain quality. In total,
306 markers have been placed on the linkage map – 138 RFLPs, 26 SSRs, 134 AFLPs, five SSPs, and three known genes (one pyruvate
decarboxylase and two lipoxygenases). The map is 3598 cM long, with an average distance between markers of 11.8 cM, and 12.1%
of the markers deviated significantly from the expected Mendelian ratio 1:1. The molecular markers were evenly distributed
between the A and B genomes. The chromosome with the most markers is 1B (41 markers), followed by 3B and 7B, with 25 markers
each. The chromosomes with the fewest markers are 2A (11 markers), 5A (12 markers), and 4B (15 markers). In general, there
is a good agreement between the map obtained and the Triticeae linkage consensus maps. This intraspecific map provides a useful tool for marker-assisted selection and map-based breeding
for resistance to biotic and abiotic stresses and for improvement of grain quality.
Received: 14 February 2000 / Accepted: 28 April 2000 相似文献
5.
The centromeres of two tomato chromosomes have been precisely localized on the molecular linkage map through dosage analysis of trisomic stocks. To map the centromeres of chromosomes 7 and 9, complementary telo-, secondary, and tertiary trisomic stocks were used to assign DNA markers to their respective chromosome arms and thus to localize the centromere at the junction of the short and long arms. It was found that both centromeres are situated within a cluster of cosegregating markers. In an attempt to order the markers within the centric clusters, genetic maps of the centromeric regions of chromosomes 7 and 9 were constructed from F2 populations of 1620Lycopersicon esculentum × L. pennellii (E × P) plants and 1640L. esculentum × L. pimpinellifolium (E × PM) plants. Despite the large number of plants analyzed, very few recombination events were detected in the centric regions, indicating a significant suppression of recombination at this region of the chromosome. The fact that recombination suppression is equally strong in crosses between closely related (E × PM) and remotely related (E × P) parents suggests that centromeric suppression is not due to DNA sequence mismatches but to some other mechanism. The greatest number of centromeric markers was resolved in theL. esculentum × L. pennellii F2 population. The centromere of chromosome 7 is surrounded by eight cosegregating markers: three on the short arm, five on the long arm. Similarly, the centric region of chromosome 9 contains ten cosegregating markers including one short arm marker and nine long arm markers. The localization of centromeres to precise intervals on the molecular linkage map represents the first step towards the characterization and ultimate isolation of tomato centromeres. 相似文献
6.
A comprehensive linkage map of the pig based on a wild pig - Large White intercross 总被引:14,自引:0,他引:14
L. Marklund M Johansson Moller R. K. Juneja P. Mariani H. Ellegren L. Andersson B. Høyheim W. Davies M. Fredholm W. Coppieters 《Animal genetics》1996,27(4):255-269
A comprehensive linkage map, including 236 linked markers with a total sex-average map length of about 2300 cM, covering nearly all parts of the pig genome has been established. Linkage groups were assigned to all 18 autosomes, the X chromosome and the X/Y pseudoautosomal region. Several new gene assignments were made including the assignment of linkage group U1 (EAK-HPX) to chromosome 9. The linkage map includes 77 type I loci informative for comparative mapping and 72 in situ mapped markers physically anchoring the linkage groups on chromosomes. A highly significant heterogeneity in recombination rates between sexes was observed with a general tendency towards an excess of female recombination. The average ratio of female to male recombination was estimated at 1–4:1 but this parameter varied between chromosomes as well as between regions within chromosomes. An intriguing finding was that blood group loci were overrepresented at the distal ends of linkage groups. 相似文献
7.
Molecular mapping of the rf1 gene for pollen fertility restoration in sorghum (Sorghum bicolor L.) 总被引:5,自引:0,他引:5
R. R. Klein P. E. Klein A. K. Chhabra J. Dong S. Pammi K. L. Childs J. E. Mullet W. L. Rooney K. F. Schertz 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2001,102(8):1206-1212
We report the molecular mapping of a gene for pollen fertility in A1 (milo) type cytoplasm of sorghum using AFLP and SSR marker
analysis. DNA from an F2 population comprised of 84 individuals was screened with AFLP genetic markers to detect polymorphic DNAs linked to fertility
restoration. Fifteen AFLP markers were linked to fertility restoration from the initial screening with 49 unique AFLP primer
combinations (+3/+3 selective bases). As many of these AFLP markers had been previously mapped to a high-density genetic map
of sorghum, the target gene (rf1) could be mapped to linkage group H. Confirmation of the map location of rf1 was obtained by demonstrating that additional linkage group-H markers (SSR, STS, AFLP) were linked to fertility restoration.
The closest marker, AFLP Xtxa2582, mapped within 2.4 cM of the target loci while two SSRs, Xtxp18 and Xtxp250, flanked the rf1 locus at 12 cM and 10.8 cM, respectively. The availability of molecular markers will facilitate the selection of pollen fertility
restoration in sorghum inbred-line development and provide the foundation for map-based gene isolation.
Received: 22 August 2000 / Accepted: 18 October 2000 相似文献
8.
B. C. Kang S. H. Nahm J. H. Huh H. S. Yoo J. W. Yu M. H. Lee B.-D. Kim 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2001,102(4):531-539
We have constructed a molecular linkage map of pepper (Capsicum spp.) in an interspecific F2 population of 107 plants with 150 RFLP and 430 AFLP markers. The resulting linkage map consists of 11 large (206–60.3 cM)
and 5 small (32.6–10.3 cM) linkage groups covering 1,320 cM with an average map distance between framework markers of 7.5
cM. Most (80%) of the RFLP markers were pepper-derived clones, and these markers were evenly distributed across the genome.
By using 30 primer combinations, we were able to generate 444 AFLP markers in the F2 population. The majority of the AFLP markers clustered in each linkage group, although PstI/MseI markers were more evenly distributed than EcoRI/MseI markers within the linkage groups. Genes for the biosynthesis of carotenoids and capsaicinoids were mapped on our linkage
map. This map will provide the basis of studying secondary metabolites in pepper.
Received: 20 October 1999 / Accepted: 3 July 2000 相似文献
9.
S. Fukuoka H. Namai K. Okuno 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1998,97(3):446-449
Complementary recessive genes hwd1 and hwd2 controlling hybrid breakdown (weakness of F2 and later generations) were mapped in rice using RFLP markers. These genes produce a plant that is shorter and has fewer
tillers than normal plants when the two loci have only one or no dominant allele at both loci. A cultivar with two dominant
alleles at the hwd1 locus and a cultivar with two dominant alleles at the hwd2 locus were crossed with a double recessive tester line. Linkage analysis was carried out for each gene independently in two
F2 populations derived from these crosses. hwd1 was mapped on the distal region of rice genetic linkage map for chromosome 10, flanked by RFLP markers C701 and R2309 at
a distance of 0.9 centiMorgans (cM) and 0.6 cM, respectively. hwd2 was mapped in the central region of rice genetic linkage map for chromosome 7, tightly linked with 4 RFLP markers without
detectable recombination. The usefulness of RFLP mapping and map information for the genes controlling reproductive barriers
are discussed in the context of breeding using diverse rice germplasm, especially gene introduction by marker-aided selection. 相似文献
10.
Raymond A. J. J. van Daelen Frans Gerbens Fred van Ruissen Jac Aarts Jan Hontelez Pim Zabel 《Plant molecular biology》1993,23(1):185-192
The root knot nematode resistance gene Mi in tomato has been mapped in the pericentromeric region of chromosome 6. With the objective of isolating Mi through a map-based cloning approach, we have previously identified and ordered into a high-resolution genetic linkage map a variety of tightly linked molecular markers. Using pulsed-field gelelectrophoresis and various rarely cutting restriction enzymes in single, double and partial digestions, we now report long-range physical maps of the two closest flanking markers, acid phosphatase-1 (Aps-1) and GP79, which span over 400 and 800 kb, respectively. It is concluded that the physical distance between both markers is larger than predicted on the basis of genetic linkage analysis. Furthermore, two RFLP markers (H3F8 and H4H10) which map genetically to the same locus as Aps-1 do not show physical linkage, indicating severe suppression of recombination in this region of the chromosome. Finally, no evidence was obtained showing the presence of a CpG island near Aps-1. 相似文献
11.
Toshihide Arima Nobuhiro Tagashira Takashi Kamada Nobukazu Tanaka Tsutomu Morinaga 《Mycoscience》1997,38(2):127-133
We have constructed a chromosome-specific cosmid library from electrophoretically separated chromosomes of the basidiomyceteCoprinus cinereus and performed contig mapping and analysis of chromosome length polymorphisms (CLPs) for the smallest chromosome of the 5302
strain. A contig map of about 300 kb indicated that the novel size chromosomes in the F1 progeny were apparently recombinants containing physical markers derived from both ends and central regions in this map.
This may be the first case in which the formation of CLPs in the F1 generation has been explained using the contig map. The results obtained were consistent with the hypothesis that novel CLPs
were produced by meiotic recombination between the parental homologous chromosomes of unequal sizes. 相似文献
12.
C. Taylor K. W. Shepherd P. Langridge 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1998,97(5-6):1000-1012
A genetic map of the long arm of chromosome 6R of rye was constructed using eight homoeologous group-6 RFLP clones and five
PCR markers derived from the rye-specific dispersed repetitive DNA family, R173. The map was developed using a novel test-cross
F1 (TC-F1) population segregating for resistance to the cereal cyst nematode. Comparisons were made between the map generated with
other rye and wheat group-6 chromosome maps by the inclusion of RFLP clones previously mapped in those species. Co-linearity
was observed for common loci. This comparison confirmed a dramatic reduction in recombination for chromosome 6R in the TC-F1 population. The CreR locus was included in the linkage map via progeny testing of informative TC-F1 individuals. CreR mapped 3.7 cM distal from the RFLP locus, XksuF37. Comparative mapping should allow the identification of additional RFLP markers more closely linked to the CreR locus.
Received: 14 April 1998 / Accepted: 29 April 1998 相似文献
13.
An integrated AFLP and RFLP Brassica oleracea linkage map from two morphologically distinct doubled-haploid mapping populations 总被引:4,自引:4,他引:0
R. L. Sebastian E. C. Howell G. J. King D. F. Marshall M. J. Kearsey 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2000,100(1):75-81
Genetical maps of molecular markers in two very different F1-derived doubled-haploid populations of Brassica oleracea are compared and the first integrated map described. The F1 crosses were: Chinese kale×calabrese (var. alboglabra×var. italica) and cauliflower×Brussels sprout (var. botrytis×var. gemmifera). Integration of the two component maps using Joinmap v.2.0 was based on 105 common loci including RFLPs, AFLPs and microsatellites.
This provided an effective method of producing a high-density consensus linkage map of the B. oleracea genome. Based on 547 markers mapping to nine linkage groups, the integrated map covers a total map length of 893 cM, with
an average locus interval of 2.6 cM. Comparisons back to the component linkage maps revealed similar sequences of common markers,
although significant differences in recombination frequency were observed between some pairs of homologous markers. Map integration
resulted in an increased locus density and effective population size, providing a stronger framework for subsequent physical
mapping and for precision mapping of QTLs using substitution lines.
Received: 5 February 1999 / Accepted: 16 June 1999 相似文献
14.
J. W. van Ooijen J. M. Sandbrink M. Vrielink R. Verkerk P. Zabel P. Lindhout 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1994,89(7-8):1007-1013
In order to map genes determining resistance to bacterial canker in tomato, backcrosses were made between a resistant and a susceptible Lycopersicon peruvianum accession. The linkage study with RFLP markers yielded a genetic map of L. Peruvianum. This map was compared to that derived from a L. esculentum x L. pennellii F2 population, based on 70 shared RFLP markers. The maps showed a good resemblance in both the order of markers and the length of the chromosomes, with the exception of just one relocated marker on chromosome 9. Because backcrosses were made with the F1, either as the pollen parent or as the pistil parent, linkage maps from male and female meioses could be estimated. It was concluded that recombination at male meiosis was reduced, and that gametophytic selection for parental genotypes at more than one locus per chromosome might be partly responsible for the reduction of the estimated male map length. 相似文献
15.
Interspecific genetic linkage map, segregation distortion and genetic conversion in coffee (Coffea sp.) 总被引:1,自引:0,他引:1
C. L. Ky P. Barre M. Lorieux P. Trouslot S. Akaffou J. Louarn A. Charrier S. Hamon M. Noirot 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2000,101(4):669-676
An interspecific partial genetic linkage map of Coffea sp. based on 62 backcross hybrids is presented. F1 hybrids were generated by a cross between the wild C. pseudozanguebariae and the anciently cultivated C. liberica var. dewevrei (DEW); progeny were then derived from a backcross between F1 hybrid and DEW. The map construction consisted of a two-step strategy using 5.5 and 3.1 LOD scores revealed by simulation
file. The map consisted of 181 loci: 167 amplified fragment length polymorphism (AFLP) and 13 random fragment length polymorphism
(RFLP) loci. The markers were assembled into 14 linkage groups, each with 4–31 markers covering 1,144 cM. Segregation distortion
was observed for 30% of all loci, in particular 3:1 and 1:3 ratios equally favouring each of the two parents. The existence
of such ratios suggests genetic conversion events. This map also represents an initial step towards the detection of quantitative
trait loci.
Received: 4 Janaury 2000 / Accepted: 17 January 2000 相似文献
16.
RAPD markers linked to eastern filbert blight resistance in<Emphasis Type="Italic"> Corylus avellana</Emphasis> 总被引:2,自引:0,他引:2
Mehlenbacher SA Brown RN Davis JW Chen H Bassil NV Smith DC Kubisiak TL 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2004,108(4):651-656
A total of 1,110 decamer primers were screened for RAPD markers linked to a dominant allele in hazelnut (Corylus avellana) that confers resistance to eastern filbert blight caused by Anisogramma anomala. Twenty RAPD markers linked in coupling, and five markers linked in repulsion, were found. A seedling population was used to construct a linkage map of the region flanking the resistance locus. The map spans 46.6 cM, with 14 markers on one side of the resistance locus and eight on the other side. Eleven markers showed less than 3% recombination with resistance, including three that showed no recombination. Seven of these 11 markers are sufficiently robust to allow their use in marker-assisted selection. These include AA12850 which shows no recombination, and six markers on one side of the resistance locus: 173500, 152800, 122825, 2751130, H19650 and O161250. Marker 268580, which flanks the resistance locus on the other side, is also suitable for use in marker-assisted selection, but shows 5.8% recombination with resistance. Other markers are less suitable for marker-assisted selection because of sensitivity to changes in primer or MgCl2 concentration, or the long time required for electrophoresis to separate bands of similar size. The 16 markers closest to the resistance locus were cloned and sequenced. The W07365 marker, which showed no recombination with the resistance locus but is difficult to score, includes a CT microsatellite repeat. The sequence information will allow the design of SCAR primers and eventual map-based cloning of the resistance allele.Communicated by D.B. Neale 相似文献
17.
J. Pauquet A. Bouquet P. This A.-F. Adam-Blondon 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2001,103(8):1201-1210
The monogenic dominant genetic determinism of total resistance to powdery mildew, introduced from Muscadinia
rotundifolia into Vitis
vinifera, was further assessed in BC4 and BC5 full-sib families. A BC5 population of 157 individuals was used to select AFLP markers linked to the resistance gene, Run1. Thirteen AFLP markers were selected and a local map was constructed around the Run1 gene. Ten markers among the 13 were found to co-segregate with the resistance gene. The usefulness of these 13 AFLP markers
for the selection of Run1-carrying genotypes was further assessed through their analysis in a set of 22 Run1-carrying resistant genotypes and 16 susceptible genotypes. Three markers out of the 13 analysed were found to be absent
in all susceptible genotypes and present in all resistant individuals, and may thus represent good tools for the marker-assisted
selection of grapevine varieties resistant to powdery mildew. A recombination event among the markers that were originally
found to co-segregate was observed in one of the resistant individuals, showing that recombination is possible in this region
and may therefore be observed in larger populations.
Received: 18 October 2000 / Accepted: 4 April 2001 相似文献
18.
Eeva-Marja Sankila Pertti Sistonen Frans Cremers Albert de la Chapelle 《Human genetics》1991,87(3):348-352
Summary We report linkage studies in 18 choroideremia (TCD) families using four closely linked polymorphic markers. Probe pZ11, which is known to be deleted in several unrelated patients with TCD, showed no recombinations (z
max 15.63 at = 0.00). In contrast, one recombination was observed with DXS367, which is also physically very close to TCD. Loci DXS95 and DXYS69 each showed more than one recombination with TCD. Moreover, these analyses revealed a double crossover between TCD and DXYS1, changing the previously reported very close linkage to a recombination fraction of 0.04 with a lod score of 9.93. Multipoint linkage analysis placed TCD proximal to DXS95-DXYS69 and very close to DXS367-pZ11 with almost identical multipoint lod score maxima either proximal to DXS367 (z
max= 23.43) or proximal to pZ11 (z
max=23.36). These results provide a refined linkage map around TCD and will also be useful in DNA diagnostics of the disease. 相似文献
19.
Sargent DJ Clarke J Simpson DW Tobutt KR Arús P Monfort A Vilanova S Denoyes-Rothan B Rousseau M Folta KM Bassil NV Battey NH 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2006,112(7):1349-1359
A total of 45 microsatellites (SSRs) were developed for mapping in Fragaria. They included 31 newly isolated codominant genomic SSRs from F. nubicola and a further 14 SSRs, derived from an expressed sequence tagged library (EST-SSRs) of the cultivated strawberry, F. × ananassa. These, and an additional 64 previously characterised but unmapped SSRs and EST-SSRs, were scored in the diploid Fragaria interspecific F2 mapping population (FV×FN) derived from a cross between F. vesca 815 and F. nubicola 601. The cosegregation data of these 109 SSRs, and of 73 previously mapped molecular markers, were used to elaborate an enhanced
linkage map. The map is composed of 182 molecular markers (175 microsatellites, six gene specific markers and one sequence-characterised
amplified region) and spans 424 cM over seven linkage groups. The average marker spacing is 2.3 cM/marker and the map now
contains just eight gaps longer than 10 cM. The transferability of the new SSR markers to the cultivated strawberry was demonstrated
using eight cultivars. Because of the transferable nature of these markers, the map produced will provide a useful reference
framework for the development of linkage maps of the cultivated strawberry and for the development of other key resources
for Fragaria such as a physical map. In addition, the map now provides a framework upon which to place transferable markers, such as genes
of known function, for comparative mapping purposes within Rosaceae. 相似文献
20.
B. Jáuregui M.C. de Vicente R. Messeguer A. Felipe A. Bonnet G. Salesses P. Arús 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》2001,102(8):1169-1176
A map with 51 markers (46 RFLPs and five isozymes) was constructed using an interspecific F2 population between ’Garfi’ almond (Prunus amygdalus Batsch.) and ’Nemared’ peach [Prunus persica (L.) Batsch.]. This map was developed by selecting markers covering most of the distance of the eight linkage groups from
previously constructed Prunus maps. The markers studied in this population mapped to seven linkage groups instead of the eight expected in Prunus. Markers belonging to groups 6 and 8 in previous maps formed a single group in the ’Garfi’×’Nemared’ F2 and several marker pairs placed in different groups in other maps exhibited tight linkages. The study of pollen fertility
and chromosome behavior during meiosis in the F1 generation allowed us to confirm the hypothesis that a reciprocal translocation exists between ’Garfi’ and ’Nemared’. Based
on independent evidence of linkage between markers and pollen fertility data in the F2 population, we concluded that the breakpoint of the reciprocal translocation was placed between markers AC50 and AG26A in
group 6 and between markers AG112A and FG230A in group 8.
Received: 28 June 2000 / Accepted: 17 October 2000 相似文献