棉花自交系农艺性状的遗传相关性和通径分析

Genetic Correlation and Path Analysis of Cotton Inbred Lines

通过对20个棉花不育繁殖自交(品)系的10个农艺性状的相关性和通径分析。结果表明:铃数是决定棉花单株皮棉产量的最主要的因素,它与单株皮棉产量的相关系数和通径系数分别为0.9111和0.835,铃重与单株皮棉产量的相关系数和通径系数分别为0.4596和0.435,紧随其后。在棉花育种过程中,根据各农艺性状对单株皮棉产量影响的大小并参考各农艺性状之间的相互作用可选育出皮棉产量高的单株。

An crossing random experiment was conducted to analyse 10 agronomic characters of 20 cotton inbred lines.The study results show that the boll number is the most important factor that determines the cotton lint yield per plant , the correlation coefficient and path coefficient of its number and lint yield per plant are respectively r = 0. 911 1 and P = 0. 835 ; the correlation coefficient and path coefficient of boll weight and lint yield per plant are r = 0. 459 6, P = 0. 435. In breeding practices, the single plant with high lint yield can he selected on the basis of the effect of agronomic character on llnt yield of single plant and the interaction among agronmiic characters.