Identification and comprehensive analysis of Verticillium wilt resistance in 35 cotton strains
[Objective]To select cotton strains with high quality,high yield and strong disease resistance.[Methods]35 cotton strains were taken as the research objects,and principal component and cluster analysis on 18 main characters of this population was conducted.[Results]The results showed that the coefficient of variation of agronomic traits of 35 cotton strains ranged from 1.67％(UI)to 43.10％(IR),among which the coefficient of variation of relative disease index(IR),boll number(TBN),effective boll number(EBN)and lint yield per plant(LYPP)were larger.The relative disease indexes of 1(4-13),2(4-22),10(4-2-7-3)and 16(10Q-67-3)were lower than 20,indicating strong resistance to Verticillium wilt;That there was no correlation between lint yield per plant and each character,and there was restriction between lint yield and quality character.The five principal components were 5.334,3.423,3.105,1.298 and 1.105,respectively,and the contribution rates were 29.636％,19.019％,17.249％,7.214％and 6.141％,respectively,with the cumulative contribution rate reaching 79.259％.35 materials were divided into four categories,the group I and group II strains showed excellent quality,strong disease resistance,but low yield.The groupⅢstrains showed high yield,but poor quality and weak disease resistance.The groupⅣof strains showed resistance to the dis-ease,but the yield and quality were slightly lower.[Conclusion]The intersection of the top 10 F scores of each group and principal component was selected,and the excellent material No.21(37-129-3)and No.30(44-17-8)were selected.
万方数据
维普
