陆地棉生育期与9个主要性状的相关关系

Study on Correlation between Early Maturity and Several Main Characters of Upland Cotton

研究了来自不同生态区的 75份陆地棉品种的早熟性与主要农艺性状、产量性状及纤维品质相关性。结果表明 ,在新疆独特的自然生态条件及“矮、密、早”栽培模式下 ,中 (早 )熟类型品种的表现相对最佳 ;生育期 ,同果枝始节、单株结铃、铃重均呈极显著正相关 ,偏相关系数分别为 0 .3 91 73、0 .4 1 40 7、0 .4 0 3 1 2 ;与2 .5%跨长、断裂强度、马克隆值呈不显著的正相关及负相关 ,偏相关系数分别为 0 .1 861 8、-5.76E-0 0 3、0 .1 74 3。说明早熟性品种的丰产性不如中、晚熟类型品种 ;选育早熟而优质的品种是可能的。在性状选择过程中 ,以果枝始节、衣分。

The correlativition between early maturity and several main characters including lint yield and quality of 75 upland cotton varieties from different ecologic regions were studied. The research results showed middle and early varieties grow better than other kinds of varieties.Development period appeared positive correlation with first boll stem,the number of bolls each plant and boll weight.The above coefficients of nartial regression were 0.39173,0.41407,0.40312 respectively.Development period appeared positivo or negative correlation with 2.5% fiber length,fibre strength and micronaire.The coefficients of pavtial regression were 0.18618,-5.76E 003,0.1743 respectively.So the yield of early variety was less than middle or late one.It is possible to select early variety with high quanlity.The first boll stem.Lind percent and fibre strength were considered first.It is the effective and economical way to select ideal characters.