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排序方式: 共有167条查询结果,搜索用时 15 毫秒
1.
R. S. Gill H. S. Dhaliwal D. S. Multani 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1988,75(6):912-916
Summary Nine Triticum durum — T. monococcum amphiploids (AABBAmAm) were synthesized by chromosome doubling of sterile triploid F1 hybrids involving nine T. durum (AABB) cultivars and a T. monococcum (AmAm) line. The triploid F1 hybrids had a range of 4–7 bivalents and 7–13 univalents per PMC. The synthetic amphiploids, however, showed a high degree of preferential pairing of chromosomes of the A genomes of diploid and tetraploid wheats. The amphiploids were meiotically stable and fully fertile. Superiority of four amphiploids for tiller number per plant, 100-grain weight, protein content and resistance to Karnal bunt demonstrated that these could either be commercially exploited as such after overcoming certain inherent defects or used to introgress desirable genes into durum and bread wheat cultivars. Methods for improvement of these amphiploids are discussed. 相似文献
2.
H. S. Dhaliwal S. K. Sharma D. S. Multani A. S. Randhawa 《TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik》1986,72(4):548-550
Summary The inheritance of yellow berry, a grain disorder in durum and bread wheats, was studied in six intervarietal crosses in bread wheat. The trait was found to be controlled by either two or three dominant genes. Monosomic analysis using Chinese Spring monosomic series showed the presence of two major dominant genes on chromosomes 1A and 7A, and four modifiers on 4A, 4B, 6A and 6D, which influence the expression of yellow berry in bread wheat. 相似文献
3.
A 32-year-old phenotypic female with a history of nine consecutive abortions each in the first trimester was referred for cytogenetic studies. She was found to have 45,XX,t(22;22) (p11.1;q11.1) chromosomal pattern. The Ag-NOR banding technique showed that the NORs of both the acrocentrics involved in the translocation were deleted and the loss suffered from the elimination was compensated by the increased NOR activity as well as presence of dNOR on other acrocentric chromosomes. 相似文献
4.
Secondary Trisomics and Telotrisomics of Rice: Origin, Characterization, and Use in Determining the Orientation of Chromosome Map 总被引:2,自引:0,他引:2 下载免费PDF全文
Secondary trisomics and telotrisomics representing the 12 chromosomes of rice were isolated from the progenies of primary trisomics. A large population of each primary trisomic was grown. Plants showing variation in gross morphology compared to the primary trisomics and disomic sibs were selected and analyzed cytologically at diakinesis and pachytene. Secondary trisomics for both arms of chromosomes 1, 2, 6, 7 and 11 and for one arm of chromosomes 4, 5, 8, 9 and 12 were identified. Telotrisomics for short arm of chromosomes 1, 8, 9 and 10 and for long arms of chromosomes 2, 3 and 5 were isolated. These secondary and telotrisomics were characterized morphologically and for breeding behavior. Secondary trisomics 2n + 1S.1S, 2n + 1L.1L, 2n + 2S.2S, 2n + 2L.2L, 2n + 6S.6S, 2n + 6L.6L and 2n + 7L.7L are highly sterile, and 2n + 1L.1L, 2n + 2L.2L and 2n + 7L.7L do not set any seed even upon backcrossing. Telotrisomics are fertile and vigorous. Genetic segregation of 43 marker genes was studied in the F(2) or backcross progenies. On the basis of segregation data, these genes were delimited to specific chromosome arms. Correct orientation of 10 linkage groups was determined and centromere positions on nine linkage groups were approximated. A revised linkage map of rice is presented. 相似文献
5.
MARIA JOSÉ ASINS IRENE VILLALTA MOHAMED M. ALY RAQUEL OLÍAS PAZ ÁLVAREZ DE MORALES RAÚL HUERTAS JUN LI NOELIA JAIME‐PÉREZ ROSARIO HARO VERÓNICA RAGA EMILIO A. CARBONELL ANDRÉS BELVER 《Plant, cell & environment》2013,36(6):1171-1191
The location of major quantitative trait loci (QTL) contributing to stem and leaf [Na+] and [K+] was previously reported in chromosome 7 using two connected populations of recombinant inbred lines (RILs) of tomato. HKT1;1 and HKT1;2, two tomato Na+‐selective class I‐HKT transporters, were found to be closely linked, where the maximum logarithm of odds (LOD) score for these QTLs located. When a chromosome 7 linkage map based on 278 single‐nucleotide polymorphisms (SNPs) was used, the maximum LOD score position was only 35 kb from HKT1;1 and HKT1;2. Their expression patterns and phenotypic effects were further investigated in two near‐isogenic lines (NILs): 157‐14 (double homozygote for the cheesmaniae alleles) and 157‐17 (double homozygote for the lycopersicum alleles). The expression pattern for the HKT1;1 and HKT1;2 alleles was complex, possibly because of differences in their promoter sequences. High salinity had very little effect on root dry and fresh weight and consequently on the plant dry weight of NIL 157‐14 in comparison with 157‐17. A significant difference between NILs was also found for [K+] and the [Na+]/[K+] ratio in leaf and stem but not for [Na+] arising a disagreement with the corresponding RIL population. Their association with leaf [Na+] and salt tolerance in tomato is also discussed. 相似文献
6.
Priscilla F. McAuliffe Kurt W. Evans Argun Akcakanat Ken Chen Xiaofeng Zheng Hao Zhao Agda Karina Eterovic Takafumi Sangai Ashley M. Holder Chandeshwar Sharma Huiqin Chen Kim-Anh Do Emily Tarco Mihai Gagea Katherine A. Naff Aysegul Sahin Asha S. Multani Dalliah M. Black Elizabeth A. Mittendorf Isabelle Bedrosian Gordon B. Mills Ana Maria Gonzalez-Angulo Funda Meric-Bernstam 《PloS one》2016,11(3)
7.
Background
Existing cut-offs for fasting plasma glucose (FPG) and post-load glucose (2hPG) criteria are not equivalent in the diagnosis of diabetes and glucose intolerance. Adjusting cut-offs of single measurements have not helped so we undertook this project to see if they could be complementary. 相似文献8.
JOSÉ ANTONIO FERNÁNDEZ PRIETO CARLOS AGUIAR EDUARDO DIAS MARIA ISABEL GUTIÉRREZ VILLARÍAS 《Botanical journal of the Linnean Society. Linnean Society of London》2008,157(3):493-499
The majority of authors consider Festuca jubata Lowe as an endemic species common to Madeira and the Azores. Saint-Yves proposed that F. jubata was an Azorean endemic and described a geovicarious taxon in Madeira: F. filiformis C. Sm. ex Link in Buch ssp. mandonii St.-Yves. We undertook a complete bibliographical revision of the taxonomy, nomenclature, and chorology of F. jubata s.l. , and contrasted it with morphological and anatomical studies performed on samples from the Azores and Madeira. Azorean plants usually identified as F. jubata had a character combination distinct from that of those with a Madeiran provenance. Saint-Yves' proposal of two independent taxa was correct, but he erroneously considered F. jubata as an Azorean endemic because the name F. jubata was based on Madeiran plants. Consequently, F. jubata auct. pl. from the Azores belongs to a new species. © 2008 The Linnean Society of London, Botanical Journal of the Linnean Society , 2008, 157 , 493–499. 相似文献
9.
Background
There have been many algorithms and software programs implemented for the inference of multiple sequence alignments of protein and DNA sequences. The "true" alignment is usually unknown due to the incomplete knowledge of the evolutionary history of the sequences, making it difficult to gauge the relative accuracy of the programs. 相似文献10.
Asha S. Multani Mustafa Ozen Alpana Agrawal Vicki L. Hopwood Andrew C. Von Eschenbach Sen Pathak 《In vitro cellular & developmental biology. Animal》1999,35(4):236-239
Summary Conventional and molecular cytogenetic analyses of three murine cancer cell lines that had been induced in male athymic mice
by the injection of three different human prostate cancer cell lines revealed selective amplification of the Y chromosome.
In particular, analysis of metaphase and interphase nuclei by fluorescence in situ hybridization (FISH) with the mouse Y chromosome-specific
DNA painting probe revealed the presence of various numbers of Y chromosomes, ranging from one to eight, with a large majority
of nuclei showing two copies (46.5–60.1%). In Interphase nuclei, the Y chromosomes showed distinct morphology, allowing identification
irrespective of whether the preparations were treated for 15 min or for 5 h with Colcemid, a chemical known to cause chromosome
condensation. However, FISH performed on human lymphocyte cultures with chromosome-specific DNA painting probes other than
the Y chromosome did not reveal condensed chromosome morphology in interphase nuclei even after 12 h of Colcemid treatment.
Our FISH results indicate that (1) the Y chromosome is selectively amplified in all three cell lines; (2) the mouse Y chromosome
number is comparable in both interphase and metaphase cells; (3) the Y chromosome number varies between one and eight, with
a large majority of cells showing two or three copies in most interphase nuclei; (4) the condensation of the Y chromosome
is not affected by the duration of Colcemid treatment but by its inherent DNA constitution; and (5) the number of copies of
the Y chromosome is increased and retained not only in human prostate tumor cell lines but also in murine tumors induced by
these prostate tumor cell lines. 相似文献