Comprehensive Analysis of Main Characters of New Sorghum Varieties Registered in Inner Mongolia Autonomous Region
Since the implementation of the non-major crop variety registration system,the number of registered sorghum varieties has increased to a certain extent in Inner Mongolia Autonomous Region.In order to clarify the evolution trend of sorghum varieties in recent years,and to provide theoretical basis for the breeding of new sorghum varieties.In this study,genetic diversity analysis,correlation analysis,principal component analysis,clus-ter analysis and grey correlation analysis were conducted for 12 traits of 171 sorghum varieties registered in Inner Mongolia.The results showed that 10 of the 13 breeding units registered with more than 5 new sorghum varieties were seed enterprises,and 126 new sorghum varieties were bred,accounting for 73.68％of the total varieties.The genetic diversity index of quantitative traits of all varieties was greater than 1,and the coefficient of variation was more than 10％except growth period and starch content,which indicated that the range of variation was large and the genetic diversity was rich.The correlation analysis of 12 characters of sorghum varieties was carried out.The growth period,grain weight per panicle,1 000-grain weight and head smut resistance were all positively correlated with the yield.The above four characters could be major improved to achieve high yield in the breeding of high-yielding sorghum varieties.Through principal component analysis,the 12 traits were simplified into 4 principal components,and the cumulative genetic contribution rate was 62.39％,which contained the majority of genetic in-formation of this batch of varieties.Through cluster analysis,all the varieties were divided into four groups.The group Ⅰ contained 140 sorghum varieties,mostly hybrid varieties;the group Ⅱ contained 17 sorghum varieties with moderate growth period;group Ⅲ were all late-ripening varieties;group Ⅳ sorghum varieties are special sorghum,use the part as stalk,so the plant height is high,can be used for processing broom.Grey correlation analysis showed that growth period(0.959 4),1 000-grain weight(0.957 5)and grain weight per panicle(0.955 9)had the greatest influence on yield,which was consistent with the correlation analysis results.
NETL
NSTL
万方数据
