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棉花形态性状对于棉株营养生长至关重要,同时,对其生殖生长也有着关键影响。该研究对来源于3个不同种植环境下的39个陆地棉品种材料及其178个F1组合的株高、茎秆粗、第一果节数和果枝数的遗传结构进行了剖析。关联分析采用基于混合线性模型的统计方法,剖析的遗传效应包括加性效应、显性效应、上位性效应及其与环境的互作效应。结果共检测到25个数量性状SSR(simple sequence repeat,简单重复序列)位点与这4个形态学性状显著相关,总遗传率达到63.08%~78.28%;加性、显性及其与环境的互作效应是棉花形态性状遗传的重要遗传资源,直接选择显著的SSR位点可优化棉株的形态性状。
Morphological traits of cotton are crucial for the vegetative growth of cotton plants and also have a key impact on their reproductive growth. The study analyzed the genetic structure of plant height, stem diameter, first fruit number and fruit number in 39 upland cotton cultivars derived from three different planting environments and their 178 F1 combinations. The correlation analysis uses a statistical method based on a mixed linear model. The genetic effects analyzed include additive effects, dominant effects, epistatic effects and their interaction with the environment. Results A total of 25.08% SSR (simple sequence repeat) loci were found to be significantly associated with these 4 morphological traits, with the total heritability reaching 63.08% -78.28%. The additive, dominance and environmental factors The reciprocal effect is an important genetic resource for cotton morphological traits. Direct selection of significant SSR loci can optimize the morphological traits of cotton plants.