不同旱稻品种产量与性状的主成分分析

为了明确旱稻品种的生长发育规律,以及与产量形成的主要因素,为旱稻育种与栽培研究提供理论依据。本试验以10个参试旱稻品种(系)为试材,采用随机区组设计,通过对旱稻品种的主要农艺性状进行主成分分析,研究结果表明:参试品种在不同性状间差异较大,尤其在有效穗数、穗实粒数等高产育种性状上存在较大差异。吉林省旱稻主栽品种粒数因子较为重要,贡献率为40.428%,并以穗粒数、每穗实粒数的分量值较高,而产量的提高应进一步提高株高,同时提高有效穗。因此,在旱稻高产育种中,应适度增加材料的株高和选择多穗的材料,可增加选育材料的单株产量。

Principal Component Analysis of Yields and Other Traits in Upland Rice

In order to elucidate the law of growth and development of upland rice and main factors associating with yield formation,the study was conducted to provide the theoretical basis for breeding and cultivation of upland rice.Using random block design,the main economical characters of nine upland rice cultivars were studied by principal component analysis.The results showed that significant difference was found among cultivars characters especially in productive panicles per plant and fully-ripened grains per panicle.Grain number factor in upland rice was very important,and the contribution rate was 40.428%.The flowers per panicle and fully-ripened grains per panicle had higher contribution rates.Plant height and number of productive panicles should increase at the same time for high yield.Therefore,the yield of upland rice could be increased through selecting cultivars with higher plant and higher number of productive panicles.