Analysis of the chromosome constitution of yunnan wheat triticum aestivum ssp yunanensis king with double ditelosomic lines of triticum aestivum cultivar chinese spring

Huang, L.; Chen, P.; Liu, D.

Scientia Agricultura Sinica 22(4): 13-16

1989


ISSN/ISBN: 0578-1752
Accession: 007017719

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Abstract
Yunan Wheat (Triticum aestivum ssp. yunanensis King, as male parent) was crossed with 21 double ditelosomic Lines of Triticum aestivum cv. Chinese Spring, respectively, being used as female parents, and meiotic analysis of telosomic pairing was conducted in F1 of twenty-one combinations. 77.7-93.7% PMCs with heterotypic trivalent (ttl''') resulted from pairing between two telosomic chromsome of Chinese Spring and Yunan Wheat were observed in thirteen combinations indicating 13 chromosomes of Yunan Wheat scarcely differentiated from their corresponding chromosomes of Chinese Spring. PMCs showing chromosome configurations 2tl''' , tl'' +t and t' + t' with the frequencies of 35.0-73.7%, 21.5-55.0% and 1.0-10.0% respectively were demonstrated in the remaining 8 combinations (involving telosomics of 2A, 7A, 2B, 4B, 5B, 6B, 1D and 5D). It is suggested that certain differentiations of chromosome arms have probably occurred in these 8 chromosomes of Yunan Wheat. Trivalents and quadrivalents without involvement of telosomics were observed in most combinations. This means some translocation perhaps happened in certain chromosomes of Yunan Wheat.