水稻两用核不育系早生快发特性研究

Character of Early Growth and Quick Development of Genic Male Sterility Lines

以Y58S、科8S和创5S为材料,对水稻两用核不育系的早生快发特性进行了研究。结果表明:科8S、创5S的早生快发特性优于Y58S,表现为生育前期出叶速率和分蘖增加速度快,分蘖发生早,有效穗数多,干物质积累量大;齐穗期单株绿叶数、单株顶3叶叶面积及单株叶面积,科8S、创5S均显著大于Y58S,有助于群体维持较高的光合速率;科8S、创5S单株库容量大,单株有效穗数、单株总粒数和千粒重是其产量性状优势。科8S、创5S是两个好的早生快发水稻两用核不育系,有望选配出高产稳产广适的杂交水稻新组合。

This study used the male sterility lines Y58S,Ke8S and Chuang5S as the materials to study the character of early growth and quick development of genic male sterility lines.The results showed that,the character of early growth and quick development of Ke8S and Chuang 5S was better than that of Y58S,which behaved in the fast growth of tiller and leaf age.The character of early growth and quick development behave well,tillering early and fast,having enough number of ultimate effective panicles and higher biomass accumulation;Ke8S and Chuang5S have the superiority in effective panicles, spikelets per plant and 1000-grain weight than Y58S,which contribute to form large sink size.In the period of full heading date,Ke8S and Chuang5S are well than Y58S in the green leaf number,top three leaves area and leaf area per plant, but lower in Photosynthesis.Ke8S and Chuang5S are good germplasm resources,which will have higher opportunity bred new hybrid combination with wide adaptability,high and stable yield.