论文部分内容阅读
利用 2 0个高产水稻品种 (系 ) ,研究了与产量有关的 1 2个经济性状的基本遗传参数 ,并进行了主成分分析。结果表明 :穗数 /m2、产量、株高、千粒重的遗传力较高 ,结实率、干物重、颖花量相对较低 ;剑叶面积、穗下节长、穗数 /m2、颖花量、实粒数 /穗、单株产量、单株干重和千粒重均与产量呈显著或极显著相关关系 ;入选品种主要特征性状为产量、实粒数 /穗、单株穗数、株高、穗数 /m2 。以上结果说明 ,在淮北地区气候条件下 ,超高产育种应采取在单位面积足穗基础上 ,提高每穗粒数和千粒重的育种策略
Using 20 high-yielding rice varieties (lines), the basic genetic parameters of 12 economic traits related to yield were studied and the principal component analysis was carried out. The results showed that: the number of spikes / m2, yield, plant height, 1000-grain weight had higher heritability, seed setting rate, dry matter weight and spikelet yield were relatively lower; leaf area, spike length, , Grain yield per plant, grain yield per plant, dry weight per plant and grain weight per plant were all significantly or extremely significantly correlated with the yield. The main traits of the selected cultivars were yield, number of solid grains per panicle, number of panicles per plant, plant height, Spike number / m2. The above results show that in the climate conditions in Huaibei, the super-high-yielding breeding should be based on per unit area foot spike, to improve the number of grains per spike and 1000-grain weight breeding strategy