水稻雄性不育系珍汕97A抽穗期的基因型分析

水稻雄性不育系珍汕97A是我国应用最大，使用最广泛的不育系，利用抽穗期基因型明确的秋光（e1e1e2e2e3e3se-1^eSe-1^e)，越光（E1E1E2E2e3e3Se-1^eSe-1^e),日本晴（E1E1e2e2e3e3Se-1Se-1)和日光（E1E1E2E2e3e3Se-1Se-1)作测验品种，分析了水稻珍汕97B的抽穗期基因型，结果表明，珍汕97B的抽穗期感光基因型为：e1e1e2e2E3E3Se-1Se-1，同时还存在1对隐性感光抑制基因i-Se-1，进一步用QTL近等基因系NIL（Hd1),HIL(Hd2),NIL(Hd3),NIL(Hd5)和NIL（Hd6)进行的实验也验证了珍汕]97B 在1个显性的主效感光基因Se-1，以及其他感光修饰基因，如E3，Hd3(En-Se-1),Hd5和Hd6的基因的作用。因此，推测珍汕97A带有主效感光基因是其配制的灿型杂交稻抽穗期超亲表现的内因。

Analysis of Heading Time Genotype for a Rice Male Ster ile Line Zhenshan 97A

Zhenshan 97A, a rice male sterile, were applied widely si nce the release of hybrid rice in 1973 in China, but the genotype of heading tim e in this sterile line was still unknown. This definitely limited the further us e of this sterile line in breeding practice and re-production of hybrid seeds. To solve this problem, we analyzed the segregation pattern of phenotype of headi ng time in progenies from crosses between Zhenshan 97A and four tester cultivars , Akihikari (e 1e 1e 2e 2e 3e 3 Se-1eSe-1e), Koshihikari (E 1E 1 E 2E 2e 3e 3 Se-1eSe-1e), Nipponbare (E 1E 1e 2e 2e 3e 3Se-1 Se-1) and Hinohikari (E 1E 1E 2E 2e 3e 3S e-1Se-1),whose genotypes of heading time were already known. The results showed that the genotype of heading time in Zhenshan 97A was e 1e 1e 2 e 2E 3E 3Se-1Se-1 and it also carri ed a recessive inhibitor i-Se-1 for phtoperiod-sensitivity. Mea nwhile, a ma jor photoperiod-sensitive dominant genes Se-1 and other modifie d photoperio d-sensitive genes: i-Se-1, E 3,Hd3 (En-Se-1), Hd5 and Hd6, were ident ified in Zhenshan 97A by crossing with QTL nearly isogenic lines: NIL (Hd1),NIL (Hd2),NIL(Hd3),NIL( Hd5) and NIL(Hd6).