贵州旱稻种质资源主要农艺性状的主成分分析

Principal Component Analysis of Major Agronomic Traits on Upland Rice Germplasm Resources in Guizhou

对贵州98份旱稻种质资源主要农艺性状的主成分进行了分析,结果表明:种质间性状变异幅度较大,类型丰富,可选择性大。10个农艺性状可归为4个主成分,其累积贡献率为77.03%。其中,第一主成分主要由穗实粒数和穗总粒数2个性状决定,第二主成分主要由单株有效穗、千粒重和穗长3个性状决定,第三主成分主要代表单株产量,第四主成分反映了粒宽与生育期的情况。根据主成分值对供试材料的主要农艺性状进行综合评价,紫黑糯、红壳粳、光壳粳糯(2)等10个旱稻种质在穗型、结实率、分蘖、单株产量等性状上表现较佳。

Principal component analysis was conducted based on 10 agronomic traits of 98 accessions of upland rice germplasm resources in Guizhou.The results showed that there was remarkable variance among traits of the accessions and abundant trait types to select.Ten agronomic traits of the accessions could be classified into four principal components which with cumulative proportion of 77.03 %.The first principal component was determined by spikelets per panicle,total grain per panicle.The second was determined by effective spikes per plant,1000-grain weight and panicle length.The third mainly represented yield per plant,and the fourth reflected grain and growth period of the accessions.Based on the principal component values of main agronomic traits of these accessions,integrated assessment was undertaken,10 accessions of upland rice such as Ziheinuo,Hongkejing,Guangkejingnuo（2） performed well in terms of panicle type,seed setting rate,tillering and yield.