小麦背景中簇毛麦6V染色体的遗传稳定性及其在配子中的传递

Genetic Stability and Transmission of Chromosome 6V from H. villosa Through Gametes in Wheat Background

小麦－簇毛麦6V二体附加系、6A（6V）二体代换系、6AL·6VS二体易位系在细胞学上是基本稳定的，6V、6AL·6VS染色体能够通过配子稳定地传递给后代。在杂合状态下，带有6V的配子传递率普遍显著下降。在单体附加系（21”W＋6V’）中，6V通过雌配子的传递率（11．3％）高于通过雄配子的传递率（5．9％）；在单体代换系（20”W＋6A’＋6V’）中，6V通过雌配子的传递率（10．4％）低于通过雄配子的传递率（255％），但均显著低于理论值（50％）；在单体易位系（20”W＋6A’＋6AL·6VS）中，6AL·6VS通过雌、雄配子的传递率接近理论值（50％）。另外，对杂合状态下6V、6AL·6VS通过自交的传递率，以及小麦第6染色体组单体背景中6V通过自交的传递率作统计和分析，认为6V对6A、6D的补偿作用可能大于6V对6B的补偿作用。

Wheat-H. villosa 6V disomic addition line, 6A(6V) disomic subsitution line, 6AL . 6VS disomic translocation line were basically stable on cytology, chromosomes 6V and translocation chromosomes 6AL. 6VS in them can transmit to offsprings stablly.The transmission frequency of garnetes with 6V in heterozygous plants were decreased clearly. In monosomic-addition line (21' W+ 6V' ), the transmission frequency of 6V was higher through female garnetes than through male garnetes(11.3% and 5.9%,respechvely). In monosomic-substitution line (20'W + 6A' +6V' ), the transmission frequency of 6V was lower through female garnetes than through male gametes (10.4% and 25.5%, respectively), but all of them were significantly less than expected (50%). The transmission of 6AL. 6VS was normal in monosomic translocation line (20' W +6A' +6A'. 6V'). In addition, the transmission frequency of 6V(6AL. 6VS)in heterozygous plants and 6V in wheat monosomic of homoeologous group 6 through self-crossing was scored and analysed, We consider that the functional compensation of 6V for 6A or 6D may be stronger than that of 6V for 6B.