Results 171 to 180 of about 2,373 (206)
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Suppression of Homoeologous Pairing by B Chromosomes in a Lolium Species Hybrid
Nature New Biology, 1972INTERSPECIFIC hybridization together with polyploidy has been an important force in the evolution of many of our graminaceous crop plants. Both wheat (Triticum aestivum) and oats (Avena sativa), for example, are natural allohexaploids derived in each case from the hybridization of three separate but related diploid species.
G M, Evans, A J, Macefield
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Meiotic duration in wheat genotypes with or without homoeologous meiotic chromosome pairing
Proceedings of the Royal Society of London. Series B. Biological Sciences, 1974In order to investigate the possible relation between meiotic time and meiotic chromosome pairing behaviour, meiosis was timed in various forms of wheat and wheat hybrids. First, meiosis was timed in tenTriticum aestivum(var. Chinese Spring) genotypes with different chromosome constitutions which differed widely in the meiotic pairing behaviour ...
M D, Bennett, G A, Dover, R, Riley
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Analysis of karyotypic stability of homoeologous-pairing (ph) mutants in allopolyploid wheats
Chromosoma, 2001Karyotypic analysis of wheat lines with different genotypes for the homoeologous-pairing loci Ph1 and Ph2 was carried out by means of a genomic in situ hybridization method that allowed unequivocal identification of the A, B and D genomes. Chromosomal rearrangements mainly affecting the A and D genomes were found in all plants of allohexaploid wheat ...
E, Sánchez-Morán +2 more
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GENETIC SUPPRESSION OF HOMOEOLOGOUS CHROMOSOME PAIRING IN HEXAPLOID WHEAT
Canadian Journal of Genetics and Cytology, 1972Greater genetic complexity has been revealed for the control of bivalency in hexaploid wheat. A suppressor of homoeologous pairing has been detected on chromosome 3A. Thus, there are two suppressors in homoeologous group 3. The 3A suppressor may be homoeoallelic to either the suppressor on 3Dβ or the promoter, detected in this study, on 3Dα ...
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New Phytologist, 2023
Summary Allopolyploidization may initiate rapid evolution due to heritable karyotypic changes. The types and extents of these changes, the underlying causes, and their effects on phenotype remain to be fully understood. Here, we designed experimental populations suitable to address these issues using a synthetic allotetraploid wheat.
Jing Zhao +10 more
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Summary Allopolyploidization may initiate rapid evolution due to heritable karyotypic changes. The types and extents of these changes, the underlying causes, and their effects on phenotype remain to be fully understood. Here, we designed experimental populations suitable to address these issues using a synthetic allotetraploid wheat.
Jing Zhao +10 more
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THE PAIRING OF AN ALIEN CHROMOSOME WITH HOMOEOLOGOUS CHROMOSOMES OF WHEAT
Canadian Journal of Genetics and Cytology, 1972The homoeology of chromosome A of Triticum umbellulatum has been determined by studying its pairing relationships with wheat telocentrics in hybrids having the chromosome constitution of 20 wheat chromosomes + one wheat telocentric chromosome + seven Triticum speltoides chromosomes + chromosome A.
Raghbir S. Athwal, Gordon Kimber
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HOMOEOLOGOUS CHROMOSOME PAIRING AND RESTRICTED SEGREGATION IN THE FERN CERATOPTERIS
American Journal of Botany, 1978The segregation of a marker characterized by pale green gametophytes was monitored within an inbreeding study of the polyploid fern Ceratopteris. Although all of the sporophytes showing segregation were derived from the self‐fertilization of haploid gametophytes, a low overall frequency of 2.5% pale gametophytes was observed in the F3–F5 generations. A
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Increased homoeologeous chromosome pairing in Hordeum vulgare × Triticum aestivum hybrids
Nature, 1977WHEAT and barley are the most important cereals in the agriculture of temperate zones. Although both genera belong to the same tribe, Triticeae, apparently successful crosses between wheat and barley have been reported recently1,2. I report here the production, morphology and cytology of F1 hybrids of Hordeum vulgare L.
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Interaction between rye B-chromosomes and wheat genetic systems controlling homoeologous pairing
Chromosoma, 1980The interactive effect on homoeologous pairing of rye B-chromosomes with the absence of both pairing suppressor (3A, 3D, 5B) and promotor (3B, 5A, 5D) chromosomes of common wheat (Triticum aestivum L.) is analyzed by comparison of pairing at Metaphase I of 27-, 27+2B, 28- and 28+2B-chromosome plants.
C. Romero, J. R. Lacadena
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Journal of Plant Research, 2003
Segregation of genotypes through homoeologous chromosome pairing in the apogamous species Dryopteris nipponensis was tested by electrophoretic analysis. Of 284 progeny examined (250 gametophytes and 34 sporophytes), from the parental sporophyte with the Pgi-2 genotype abc, five showed different genotypes from that of the parent (three aac, one bbc and ...
Hiroshi, Ishikawa +3 more
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Segregation of genotypes through homoeologous chromosome pairing in the apogamous species Dryopteris nipponensis was tested by electrophoretic analysis. Of 284 progeny examined (250 gametophytes and 34 sporophytes), from the parental sporophyte with the Pgi-2 genotype abc, five showed different genotypes from that of the parent (three aac, one bbc and ...
Hiroshi, Ishikawa +3 more
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