论文部分内容阅读
以６个具有代表性的小麦品种（系）为供试亲本，按照Ｇｒｉｆｉｎｇ方法２进行完全双列杂交，对杂种Ｆ１的单株籽粒产量及其构成性状（单株粒数、单穗粒数、单穗粒重、千粒重）分别进行杂种优势分析、亲子相关分析及通径分析。结果表明：（１）杂种Ｆ１的单株籽粒产量杂种优势最强，其它４个性状依次为单穗粒重＞单株粒数＞单穗粒数＞千粒重。（２）单穗粒数在低值亲本（ＬＰ）上亲子间呈显著正相关，其它４个性状在各亲本类型上亲子间的相关均未达到显著水平。（３）单株籽粒产量的提高主要依赖于单株粒数的增加，其次是单穗粒重和千粒重，单穗粒数对单株籽粒产量的贡献较小。
Six representative wheat cultivars (lines) were used as tested parents, and the complete dialleaf cross was performed according to Grifing method 2. The yield per plant and the trait of the hybrid F1 (the number of per plant, the number of grains per spike, Single grain weight, 1000-grain weight) were analyzed heterosis, parent-child-related analysis and path analysis. The results showed that: (1) Hybrid F1 had the strongest heterosis in grain yield per plant, and the other 4 traits followed by grain weight per plant> grain per plant> grain per plant> 1000-grain weight. (2) There was a significant positive correlation between grain number per spike and parent-child in low-value parent (LP), while the other four traits did not reach significant level in each parental type. (3) The improvement of grain yield of a single plant mainly depends on the increase of grain number per plant, followed by the single grain weight and 1000-grain weight, while the single grain number contributed little to single grain yield.