常规棉产量与主要性状的灰色关联度分析

The Grey Correlation Analysis of Yield and Main Characteristics of Conventional Cotton

为探索常规棉产量与主要性状的相互关系,以2013年湖北省棉花区域试验19个棉花品种为材料,运用灰色系统理论对影响常规棉产量的12个主要性状进行灰色关联分析。结果表明,主要性状与常规棉产量的关联度大小依次为:籽指(r=0.491)>铃期病指(r=0.430)>衣指(r=0.404)>单株铃数(r=0.396)>始果枝着生节位(r=0.394)>果枝数(r=0.390)>衣分(r=0.388)>霜前花率(r=0.382)>生育期(r=0.377)>单铃重(r=0.367)>株高(r=0.345)。说明在常规棉的选育和高产栽培时,要选择籽指较高、抗病性强的品种,同时注重结铃性和早熟性。

In order to clear relationship between yield and main traits of the conventional cotton . the autor took 1 9 cotton vari-eties from regional test as materials in Hubei province in 201 3,carrying on the grey relation analysis of 1 3 main characters adopted the grey system theory. Results showed that,the correlation of main characters and yield was as followed：seed index （r=0 . 491 ）〉disease index of bell stage （r =0 . 430）〉lint index （r=0 . 404）〉boll number per plant （r=0 . 396）〉beginning fruit node （r=0 . 394）〉branch number （r =0 . 390）〉lint （r =0 . 388）〉flowering rate before frost （r=0 . 382）〉growth period （r=0 . 377）〉single boll weight〉plant height （r=0 . 345） . In breeding and high-yielding culti-vation of conventional cotton,choosing the higher seed index and stronger disease resistance of variety ,at the same time,pay-ing attention to boll setting and precocity .