消除籼型野败不育系包颈现象的研究

 籼型野败不育系的包颈现象是影响制种和繁种产量的重要因素之一。试验证明,利用长节间种质(Elongated uppermost internode stock)的 eui 基因与野败胞质的互作效应,可使珍汕97不育系不再出现包颈现象,其穗颈伸出度达到+0.71厘米,最上一节的节间长度为28.4厘米。而对照亲本珍汕97A 和珍汕97B 的穗颈伸出度分别为-9.56匣米和1.11厘米,最上一节的节间长度分别为15.6厘米和24.0厘米。可以把 eui 基因导入籼型野败不育系之中,消除包颈现象。将来转育带有 eui 基因的珍汕97B 仍较带有 eui 基因的珍汕97A 的株高要高。该项育种工作在继续进行之中。

Studies on Eliminating Panicle Enclosure in WAType MS Line of Rice(Oryza sativa subsp.indica)

Panicle enclosed within the sheath of the flagleaf(i.e.panicle enclosure)in wild abortive(WA)-type male sterile(MS)line of indica rice is one of the major factors affecting hybrid seed production and MS line multiplication.The study indicated that the interaction between the eui gene of elongated uppermost internode stock and WA-type MS cytoplasm could eliminate the enclosure of the panicle in Zhen-Shan 97A,and the panicle neck would exsert to+0.71cm and length of uppermost internode elongated to 28.4cm.While panicle neck exsertions of parents Zhen-Shan 97A and B were-9.56 and+1.1cm,and their uppermost internode lengths were 15.6 and 24.0cm,respectively.It is possible to introduce eui gene into WA-type MS line by breeding so as to eliminate panicle enclosure. Zhen-Shan 97B with the eui gene is taller than Zhen-Shan 97A with the same gene. The breeding program is progressing successfully.