陆地棉高品质系数量性状的遗传变异与选择指数

 研究了20个高品质陆地棉品系12个数量性状的遗传变异、广义遗传力、遗传相关及产量的选择指数。结果表明，单株产量和株铃数具有较大的遗传变异，纤维品质性状的遗传变异较小，说明继续改良高品质系的产量性状潜力较大。纤维品质性状的广义遗传力介于79.07%~89.47%之间，产量及产量组分性状中以衣分和铃重最高，广义遗传力分别为89.1%和81.85%，单株皮棉重最低,为55.05%。单株皮棉重与株铃数、株铃数与果枝数成极显著遗传正相关。利用与单株皮棉重遗传相关较强的多个性状构建的选择指数，比单纯选择单株皮棉重的效果好，其中以单株皮棉重、株铃数、果枝数和果节数结合选择的效果最佳。

Genetic Variations and Selection Indices of Quantitative Traits in Upland Cotton(Gossypium hirsutum L.) Lines with High Fiber Quality

Twelve characters within twenty high quality lines from the double crosses of twelve diverse upland cotton parents were measured in a randomized,complete block at the Agriculture Experimental Station of Jiangxi Agricultural University,Nanchang,China in 2007.The genetic variation,heritability,genotypic correlation and selection index of yield and fiber traits were calculated.The genetic variation coefficients of seed cotton yield per plant,lint yield per plant and bolls per plant were 16.64%,14.71%,and 10.65...