水稻芽鞘紫线遗传分析

Analysis on the Inheritance of Coleoptile Purple Line in Rice

以不同芽鞘紫线基因型亲本相互杂交,共获得77个F1代、51个F2代和1个BF1代。调查各世代芽鞘紫线的表现及其分离情况,共获得9(10)种比例(有紫线∶无紫线):全无、27∶37(108∶148)、117∶139、1∶1、9∶7、39∶25、3∶1、13∶3、全有,其中13(有紫线)∶3(无紫线)为首次发现。分析表明,在本研究所涉及的亲本范围内,控制水稻芽鞘紫线表达的基因有4对,结合前人研究结果,提出了芽鞘紫线遗传的C_A_P_I_Ai(t)_模型。芽鞘紫线将在杂交稻种子纯度的及早和快速鉴定中发挥其独特的作用。

Seventy-senen F1 combinations and 51 F2 populations were obtained by crossing among parents with different genotypes of purple line in coleoptile, and 1 BF1 was produced in backcross XNA×(XNA×21A150). Nine(ten) segregation radios (purple line∶no-purple line) emerged in those combinations like: none(all individuals are no-purple line), 27∶37(108∶148), 117∶ 139, 1∶1, 9∶7, 39∶25, 3∶1, 13∶3, all(all individuals are purple line), and the radio of 13 purple line∶3 no-purple line was reported for the first time. The analysis indicated that 4 pairs of genes control the performance of coleoptile purple line in the rice materials used in study. Combining the other researchers’ results, a genetic system of C_A_P_I_ Ai(t)_ was recommended to explain the inheritance of coleoptile purple line in rice. The trait of coleoptile purple line must be a particular role in identifying the purity of hybrid rice seed quickly and early.