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GrainGenes Reference Report: TAG-91-105

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Reference	TAG-91-105
Title	Chromosome structure of Triticum longissimum relative to wheat
Journal	Theoretical and Applied Genetics
Year	1995
Volume	91
Pages	105-109
Author	Naranjo T
Abstract	Homoeologous pairing at meiotic metaphase I was analyzed in T longissimum x T aestivum hybrids in order to reconfirm the homoeologous relationships of T longissimum chromosomes to wheat. Hybrids between T. longissimum and 'Chinese Spring' carrying the Ph1 gene or the ph1b mutation, which showed low and high pairing levels, respectively, were used. Chromosome arms associated at metaphase I were identified by C-banding. The homoeology of chromosomes 1Sl, 2Sl, 3Sl, 5Sl and 6Sl to wheat group 1, 2, 3, 5, and 6 chromosomes, respectively, was confirmed. Chromosome arms 4SlS and 7SlS showed normal homoeologous relationships to wheat. The 4SlL arm carries a translocated segment from 7SlL relative to wheat. The 7SlL arm seldom paired, likely because this arm lost a relatively long segment and received a very short segment in the interchange with 4SlL. Available data suggest that translocation 4SlL/7SlL arose in the evolution of T. longissimum, which implies that this species was not the donor of the B genome of wheat.
Keyword	[ Hide all but 1 of 11 ] c-bands chromosome chromosome-arms chromosome-banding chromosome-pairing homoeologous-chromosome-pairing homoeologous-chromosomes homoeologous-pairing mitosis triticum triticum aestivum

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