陆地棉开花成铃性状的遗传研究——开花规律及其影响因素

Genetic analysis on flowering and boll setting in upland cotton ( Gossypium hirsutum L.): Flowering behavior and its influencing factors

对四个陆地棉品种 (系 )双列杂交试验的两年观察资料进行了棉株开花规律及其影响因素的分析。结果表明 ,棉株依螺旋模式从下向上、从里到外开花 ,平均横向开花间隔期为 5.7d,纵向间隔期为2 .3d。环境对棉株纵、横开花间隔的影响较大。不同品种 (系 )类型的开花表现不同 ,受环境条件的影响也不同 ,早熟类型材料受环境影响最大 ,中熟品种次之 ,晚熟品种相对较稳定。 F1植株较其亲本 ,间隔期随果节位变化或季节推移变动较小 ,对环境变化较不敏感。

a 2 year data from a 4×4 diallel cross was analyzed for flowering behavior and its influencing factors. The results indicated that the cotton set flowers with a spiral model, from below to up, and inside to outside. Environments had rather great effects on average intervals, where the average transverse flowering interval was 5.7 days and the lengthways interval was 2.3 days. Furthermore, different types of genotypes had different flowering behavior. Environment conditions had impacts mostly on early season materials, then the later season ones, and lest on full season ones. Compared to parents, F 1 was tardier to the environments, and the changing range of flowering interval was smaller.