摘要
采用套袋自交结实率和自然结实率为主，花粉育性和田间目测整株育性为辅的综合性状，判定新型细胞质雄性不育系马协Ａ以及它与明恢６３的杂种Ｆ_１、Ｆ_２和ＢＦ_１的植株育性，并以野败型珍汕９７Ａ作对照，比较研究了其不育性的遗传规律。结果表明，马协Ａ与珍汕９７Ａ不育性的遗传均由两对基因控制，但新型细胞质雄性不育系马协Ａ两对基因的作用方式与珍汕９７Ａ不同。前者Ｆ_２群体的育性分离符合９：３：３：１的比例，ＢＦ_１符合１：２：１的比例；后者相应群体则符合１２：３：１和２：１：１的比例，两对基因间表现为显性上位。斯米尔诺夫检验也表明马协Ａ／明恢６３和珍汕９７Ａ／明恢６３的Ｆ_２群体的结实率频率分布差异显著（Ｐ＜０．０１）。并讨论了细胞质雄性不育的遗传机理及分子基础。
Maxie A and Zhenshan 97A were crossed with Minghui 63.Their hybrids were backcrossed with Maxie B and Zhenshan 97B respectively.The F_1,F_2 and BF_1 plants were sown and identified by means of bagged seed setting rate,natural seed setting rate,pollen fertility and individual-observed fertility in field.The genetics of sterility of Maxie A and Zhenshan 97A were comparatively studied.The results show that their Sterility is controlled by two pair genes. But the intertiction of those genes in Maxie A is different from that in Zhenshan 97A,which appears to be dominant epstasis. The fertility segregation of the former comforms with geneticical ratio of 9:3:3:1 in F_2,1:2:1 in BF2,the later,12:3:1 and 2:1 :1 in the respective populations. Smirnov tests indicate the frequency distribution of seed setting ratio in F_2 of Maxie A/Minghui 63 and Zhenshan 97A/Minghui 63 is different(P<0.01).The genefic mechanism and molecule basis of cytoplasmic male sterility are discussed.
出处
《武汉植物学研究》
CSCD
1996年第2期110-116,共7页
Journal of Wuhan Botanical Research
