1976
DOI: 10.1017/s0016672300016244
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Equivalence of the A genome of bread wheat and that ofTriticum urartu

Abstract: Lines of Triticum aestivum Chinese Spring (2n = 6x = 42) which were ditelocentric or doubly ditelocentric, in turn, for the 14 chromosomes of the A and B genomes were pollinated by Triticum urartu (2n = 14). The behaviour of the marked telocentric chromosomes was scored in the 14 distinct hybrids obtained from these pollinations. In 6 of the hybrids in which different A genome chromosomes were marked by telocentrics there were from 50 to 80 % of the pollen mother cells in which the telocentrics were paired. In… Show more

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Cited by 112 publications
(43 citation statements)
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“…Chromosome 4A is peculiar in a number of its properties. For example, it is the only A genome chromosome which will not pair with chromosomes of a presumptive AA diploid T. urartu (Chapman et al, 1976) and it stands apart from the other group IV homoeologues 4B and 4D, in that it bears unique fertility factors (Sears, 1966). It is possible that chromosome 4A has its ancestry through introgression of B genome chromosomes or from some other donor species.…”
Section: Origin Of Hexaploid Wheatmentioning
confidence: 99%
“…Chromosome 4A is peculiar in a number of its properties. For example, it is the only A genome chromosome which will not pair with chromosomes of a presumptive AA diploid T. urartu (Chapman et al, 1976) and it stands apart from the other group IV homoeologues 4B and 4D, in that it bears unique fertility factors (Sears, 1966). It is possible that chromosome 4A has its ancestry through introgression of B genome chromosomes or from some other donor species.…”
Section: Origin Of Hexaploid Wheatmentioning
confidence: 99%
“…However, further studies showed that neither bread wheat chromosome 4A (originally IV) nor 4B (originally VIII) pair in hybrids between bread wheat telosomic lines and diploid einkorn wheats, T. urartu Thum. (genomes AA) and T. monococcum (genomes AmA m) (Chapman et al 1976;Dvoffik 1976;Miller et al 1981). Later studies showed wheat chromosome IV to be a member of the B genome, as is indicated by genetic compensation by chromosome 4S from Ae.…”
Section: Introductionmentioning
confidence: 99%
“…On the basis of chromosome pairing it was concluded that the A genome of both species was contributed by T. monococcum L. (2,3). The discovery of the second diploid species with the A genome, T. urartu Thum., created a dilemma, since the chromosomes of T. monococcum and T. urartu paired about equally well with the chromosomes of polyploid wheats (4,5). Investigation of polymorphism in several protein or enzyme loci suggested that the source of the A genome may be T. urartu, but the question whether T. urartu contributed the A genome of one or both tetraploid wheats remained a controversy (6, 7).…”
mentioning
confidence: 99%