陆地棉根部性状及植株主要性状与皮棉产量的相关性研究

Correlations between Lint Yield and Root and Plant Main Characters of Upland Cotton

研究了陆地棉根部性状及植株主要性状与皮棉产量的相关性。结果表明,伏前桃、铃重和主根重与皮棉产量呈负相关。衣分率、主根长度、株高、果枝数、侧根重、总根重、秋桃数、伏桃数与皮棉产量呈正相关,其中衣分率与之正相关达显著水平。通径分析表明,对皮棉产量可直接选择的性状有主根长度、主根重、总根重、伏前桃、株高、铃重和秋桃数。其余性状不能直接选择皮棉产量。在所研究的11个性状中,可对皮棉产量直接选择且最有效的是主根长度,其次是株高、伏前桃及总根重。对皮棉产量间接选择效果最好的是衣分率。

The correlations between lint yield and root and plant main characters of upland cotton were studied. The results showed that number of bolls by July 15, boll weight and taproot apeared negative correlation with lint yield. Oppositely, lint percentage, taproot length, plant height, number of fruiting branches, lateral root weight, all root weight, number of bolls by September 5, number of bolls by August 10 appeared positive correlation with lint yield. Among the eight characters, lint percentage was significantly correlated with lint yield at 0.05 level. The path analysis showed that such characters as taproot length, taproot weight, all root weight, number of bolls by July 15, plant height, boll weight and number of bolls by September 5 can be selected directly for improving lint yield, the others can not be selected directly. Taproot length was the most effective one for improving lint yield by selecting directly in the 11 characters and the following were plant height, number of bolls by July 5, all root weight, lint percentage was the most effective one for improving lint yield by selecting indirectly.