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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 hybrid rice 9 You 418 as the main control, Xu 68 you 201 high-yielding physiological characteristics and morphological characteristics and their heterosis performance. The results showed that the seedling capacity of Xu68you 201 was higher, the plant morphology was good, the population quality was good, the dry matter accumulation after heading was high, and the contribution to grain yield was high. The yield advantage mainly came from the increase of spikelets per panicle . The analysis of the heterosis of the main characters showed that the heterosis value of Xu68you 201 in yield and yield traits was lower than that in the control 9you 418, which was closely related to the higher yield of parents than the parents.