杂交中粳徐68优201的高产生理特性及杂种优势表现  

High-yielding Physiological Characteristics and Heterosis Performance of Medium Japonica Hybrid Rice Xu 68 You 201

作　　者：郭荣良[1] 王健康[1] 徐家安[1] 丁成伟[1] 吴玉玲[1] 王友霜[1] 胡婷婷[1] 赵轶鹏[1] 

机构地区：[1]江苏徐淮地区徐州农业科学研究所,江苏徐州221121

出　　处：《杂交水稻》2014年第4期63-67,共5页Hybrid Rice

基　　金：江苏省农业科技支撑计划(BE2012307);国家科技攻关项目(2011BAD35B02-02)

摘　　要：以杂交中粳9优418为主要对照,研究了徐68优201的高产生理特性和形态特征及其杂种优势表现。结果表明,徐68优201颖花库容较高,株叶形态优良,群体质量好,抽穗后干物质积累量大且对籽粒产量的贡献率高,产量优势主要来源于每穗颖花数的增加。对主要性状的杂种优势表现分析表明,徐68优201在产量及产量性状上的杂种优势值低于对照9优418,这与其双亲的产量水平高于后者亲本密不可分。The high-yielding physiological characteristics and heterosis performance of Xu 68 You 201 were studied with medium japonica hybrid rice 9 You 418 as a primary control variety. The results showed that Xu 68 You 201 had a larger sink size, better plant and leaf morphological traits, a higher population quality and a greater dry matter accumulation after heading with a higher contribution to grain yield. The yield increase of Xu 68 You 201 over 9 You 418 was mainly from the increase of the number of spikelets per panicle. Based on the analysis of heterosis performance in major traits, it was found that the values of heterosis including the heterosis over mid-parental value （HMp）, the heterosis over higher parent value （HHp） and the heterosis over lower parent value （HLe） in grain yield and yielding components of Xu 68 You 201 were lower than those of 9 You 418, resulting from the higher yielding level of its parental lines.

关 键 词：杂交中粳 徐68优201 产量优势 颖花库容 干物质积累 杂种优势 

分 类 号：S511.048[农业科学—作物学] S318