机构地区: 沈阳农业大学农学院
出 处: 《沈阳农业大学学报》 2004年第2期81-84,共4页
摘 要: 以辽宁省20世纪70年代以来历次更替的有代表性的4个水稻主栽品种和新育成的2个水稻超高产品种为试材 ,研究各品种穗部性状的变化趋势。结果表明 :随着品种更替 ,一次枝梗数、一次枝梗颖花数、二次枝梗数和二次枝梗颖花数等穗部性状均呈增加趋势 ;超高产品种在各个性状上都有所改进 ,并且结实率较高 ,使得其每穗实粒数显著高于其他品种 。 The typical rice varieties planted popularly in Liaoning since1970s were chosen to study the changes of panicle characteris-tics.The result indicated that the number of primary branch(PB),total spikelet number on PB,the number of secondary branch(SB),total spikelet number on SB increased as the new varieties released.Because of the higher seed-setting rate,the grain number(GN)per panicle of super high-yield varieties was higher than that of other varieties.So increasing the level of ench panicle characteristic would be an effective measure for obtaining further high grain yield.
领 域: [农业科学]