EXPLOITATION OF A PREFERENTIALLY TRANSMITTED CHROMOSOME FROM AEGILOPS-SHARONENSIS FOR THE ELIMINATION OF SEGREGATION FOR HEIGHT IN SEMIDWARF BREAD WHEAT-VARIETIES
EXPLOITATION OF A PREFERENTIALLY TRANSMITTED CHROMOSOME FROM AEGILOPS-SHARONENSIS FOR THE ELIMINATION OF SEGREGATION FOR HEIGHT IN SEMIDWARF BREAD WHEAT-VARIETIES
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作者：
KING, IP;KOEBNER, RMD;LAW, CN
某些半矮秆面包小麦品种往往会丢失染色体4D，携带矮秆基因Rht 2，导致产生高大的“异型”。“为了克服这个问题，已经分离出易位，涉及携带决定优先传递的基因的沙融山羊草染色体4S1的臂和携带小麦染色体4D的Rht 2的臂。 这些易位，这是来自自花授粉植物染色体4D和4S1的双单体，似乎优先在花粉和卵中传递，从而确保恒定的二体性和纯合性的Rht2。
Certain semidwarf bread wheat varieties tend to lose chromosome 4D, carrying the dwarfing gene Rht2, resulting in the production of tall "offtypes." To overcome this problem translocations have been isolated involving the arm of the Aegilops sharonensis chromosome 4S1 that carries the genes determining preferential transmission and the Rht2-carrying arm of chromosome 4D of Triticum aestivum. These translocations, which were derived by self-pollinating plants doubly monosomic for chromosomes 4D and 4S1, appear to be preferentially transmitted in both pollen and egg, thus ensuring constant disomy and homozygosity of Rht2.