陆地棉开花成铃性状的遗传研究Ⅱ.不同果枝节位的遗传规律  

Genetic Analysis on Flowering and Boll Setting in Upland Cotton (Gossypium hirsutum L.) Ⅱ. The Genetic Behavior of Different Fruiting Sites

作　　者：叶子弘[1] 朱军[1] 

机构地区：[1]浙江大学农学系,浙江杭州310029

出　　处：《作物学报》2001年第2期243-252,共10页Acta Agronomica Sinica

基　　金：国家自然科学基金!项目 ( 3 9670 3 90 )

摘　　要：本研究对四个陆地棉品种 (系 )双列杂交试验的两年观察资料按包括基因型与环境互作的加性-显性遗传模型进行棉株开花成铃规律的遗传分析。非条件及条件方差分析结果表明 ,棉株中下部内围果枝节位以显性方差为主 ,同时具有较大的基因型×环境互作方差 ;中上部及外围果枝节位的加性方差在总变异中所占的比重较大 ,越到外围基因型×环境互作方差在总方差中所占比例越大 ;相对于中下部内围果枝节位 ,中上部及外围果枝节位加性贡献率较大 (多数 >50 % ) ,显性贡献率多为 0或 <0 ,加性×环境互作及显性×环境互作贡献率的表现与加性及显性贡献率相反。不同果枝节位的平均开花数及成铃数与总铃数的相关分析表明 ,中上部及外围大部分果枝节位的开花成铃数与总铃数之间存在显著或极显著的正相关 ,而中下部内围果枝节位的开花成铃数与总铃数之间无相关或负相关 ,不同的环境条件下表现不同。An additive dominant genetic model with genotype by environment interaction was employed to analyze the genetic behavior of flowering and fruiting with 2 year data from 4×4 diallel crosses. The results of unconditioned and conditional variance analysis indicated that flowering and fruiting behaviors were mainly controlled by dominant effects on the middle low sites near the stem, and had some genotype×environment interaction variances. On the middle up sites and faraway stem, additive variance had high ratio among the total variance. Furthermore, more distal away the main stem, larger ratio of genotype×environment interaction variance would exist. For contribution rates, there had high additive contribution rate on the middle up sites and faraway stem (mostly>50%), while the dominance contribution rate of most fruiting sites on this part were 0 or <0. Compared to main effects, interaction contribution rates had different behaviors. The analysis of covariance between average flower number, boll number on different fruiting sites and total number of bolls showed that there were significant positive additive correlation coefficient on middle up sites and faraway stem, negative or zero dominance correlation coefficient on middle low sites near stem. Different environments may results in different correlating behaviors.

关 键 词：果枝节位 平均开花数 平均成铃数 相关系数 非条件遗传方差 条件遗传方差 陆地棉 开花成铃 

分 类 号：Q943[生物学—植物学]