Abstract:

In order to tap apomictic germplasm and provide reference to a line hybrid rice breeding, a preliminary research regarding agronomic traits, grain traits, correlation between grain traits has been made on the mutant with twin-embryo seedling by ion beam in auto-tetraploid rice, the closely relative strains and mediated progeny. The results showed that the plant type of diploid strains twin seedlings was smaller, the number of spikelets main spike was more, grains was smaller, grains density was higher and largest contributed to the single grain weight, compared with the twin seedlings tetraploid strains; the plant type of elymus mediated strains was larger, the number of spikelets main spike was more, grains was larger, grain density was higher, single grain weight was higher, grain volume contributed largest to the single grain weight; the original parent were not significantly different at the indicators parameters.

Key words: ion beam, twin-embryonic rice, agronomic traits, grain traits, correlation analysis

摘要：

为了挖掘无融合生殖种质并提供参考资料给一系法杂交水稻的选育，以离子束诱变所得同源四倍体双胚苗突变水稻品系、近亲系和介导后代为研究材料，对其农艺性状、谷粒性状、谷粒性状间的相关性进行了研究。结果表明，与四倍体双胚苗品系相比，二倍体双胚苗品系的株型小、主穗颖花数多、谷粒小、谷粒容重高、谷粒容重对单粒重贡献最大；披碱草介导品系的株型大、主穗颖花数多、谷粒大、谷粒容重高、单粒质量高、谷粒体积对单粒重贡献最大；原始亲本在各项指标参数中都差异不明显。

关键词: 离子束, 双胚苗水稻, 农艺性状, 谷粒性状, 相关分析