木豆种质资源形态与农艺性状的多样性分析

Diversity Analysis of Morphological and Agronomic Traits in Cajanus cajan

摘要:

为挖掘优异木豆（Cajanus cajan）种质资源，对10份木豆种质资源的10个质量性状和18个数量性状的遗传多样性进行了研究，并对其农艺性状进行了聚类分析。结果表明，质量性状的遗传多样性指数均较大，以鲜荚色（1.9219）的最高，其次是旗瓣点缀色、鲜籽粒颜色和干籽粒底色，多样性指数均为1.4855；再次为干籽粒色斑、干籽粒脐环色和有无种阜，均为0.8813；最小的是小叶叶形、旗瓣底色和株型，均为0.7219。聚类分析可将10份木豆种质资源划分为中茎稀疏型、中茎密生型和粗茎密生型3大类型。这为木豆品种选育提供了科学依据。

关键词:木豆;种质资源;农艺性状;遗传多样性;聚类分析

Abstract:

In order to explore excellent Cajanus cajan (pigeonpea) resource, the genetic diversity of 10 quality traits and 18 quantitative characters of 10 pigeonpea genotypes was studied and the agronomic characters were cluster analyzed. The results showed that the genetic diversity index of all quality traits were high, among which fresh pod color was the highest at 1.9219, and those of upper petal embellishment color, fresh seed color and dry grain color were all 1.4855, those of dry grain stain, dry grain umbilical ring color, and strophiole or not were all 0.8813, those of lobular leaf shape, petal color and plant type were the lowest at 0.7219. Ten genotypes of pigeonpea could be divided into three groups by cluster analysis, such as medium diameter and sparse, medium diameter and dense, and thick diameter and dense. These could provide a scientific basis for the variety breeding of pigeonpea.

Key words:Pigeonpea (Cajanus cajan);Germplasm resource;Agronomic trait;Genetic diversity;Cluster analysis