11份越夏香葱种质资源农艺性状鉴定及耐热性评价

为鉴定评价广西越夏香葱种质资源的农艺性状及耐热性,筛选出具有潜力的适宜广西夏秋季种植的香葱资源,本试验以从广西各香葱主产区收集的11份香葱种质资源为研究对象,开展夏季田间品比及鉴定筛选试验,同时对香葱种质农艺性状及耐热性采用主成分分析、聚类分析以及回归分析等方法进行综合评价.结果显示:通过农艺性状对比分析,筛选出灵香2...

Agronomic Character Identification and Heat Tolerance Evaluation of 11 Accessions of Over Summer Chives(Allium fistulosum L.var.caespitosum Makino)

In order to identify and evaluate the agronomic traits and heat tolerance of over summer chives(Allium fistulosum L.var.caespitosum Makino)germplasm resources from Guangxi,and to screen out potential chives germplasm resources being suitable for cultivation in summer and autumn in Guangxi,this experiment took 11 accessions of chives germplasm resources collected from various main chives producing areas of Guangxi as research object;and carried out field comparison,identification and screening tests in summer.At the same time,this experiment also conducted comprehensive evaluation on chives germplasm agronomic traits and heat tolerance by principal component analysis,clustering analysis and regression analysis.The results showed that through contrastive analysis on agronomic traits,‘Lingxiang No.2’AF90,‘Baitoucong’AF131 and‘Hezhouzhongshansazicong’AF65 were screened out for their better expression in over summer yield performance.Among chives agronomic traits indexes,the variation coefficient analysis of quantitative traits showed that the variation in single plant weight and tiller number were richer.The distribution frequency of quality traits showed that the 11 accessions of chives had a wider quality traits distribution.Principal component analysis transformed the original 19 agronomic traits into 6 comprehensive factor indexes,and the cumulative contribution rate reached 84.754%.Clustering analysis divided chives germplasm into 3 types:strong heat tolerant,medium heat tolerant and weak heat tolerant.Both‘Lingxiang No.2’AF90 and‘Baitoucong’AF131 were strong heat tolerant germplasm,and suitable for spreading in Guangxi for over summer cultivation.The mathematical model Y(heat tolerance)=7.376-0.001X1(yield)for chives heat tolerance evaluation was established by stepwise regression analysis,which could be used for identification of successive heat tolerant breeding material.