PREFERENTIAL TRANSMISSION IN BREAD WHEAT OF A CHROMOSOME SEGMENT DERIVED FROM THINOPYRUM-DISTICHUM (THUNB) LOVE

被引:18
作者
MARAIS, GF [1 ]
机构
[1] UNIV STELLENBOSCH,DEPT GENET,STELLENBOSCH 7600,SOUTH AFRICA
关键词
7DL translocation; gametocidal effect; T; aestivum; cuckoo” effect;
D O I
10.1111/j.1439-0523.1990.tb00417.x
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A Thinopyrum distichum chromosome segment translocated on chromosome arm 7DL. of the line ‘Indis’, was shown to be preferentially transmitted in crosses with other bread wheats. The translocated segment carries a gene for leaf rust resistance and produces a null condition for the endopeptidase product, EP‐Dla. These characters were used to follow the transmission of the translocated chromosome in segregating and testcross progenies derived by crossing ‘Indis’ to four bread wheat cultivars. The severity of the gametocidal response in the heterozygotes ranged from a virtually exclusive transfer of the translocation to an almost normal transmission of the homologues. In some genetic backgrounds an intermediate level of transmission occurred. In the F1 with a gametocidal response, the transmission of the normal chromosome 7D was reduced in both sexes, but the reduction may be more severe in the male germline. Copyright © 1990, Wiley Blackwell. All rights reserved
引用
收藏
页码:152 / 159
页数:8
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