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以江苏省太湖常绿果树技术推广中心枇杷种质资源圃收集的20份白沙枇杷品种的本砧16年生嫁接树作为试材,对20个白沙枇杷种质资源的9个生物学特性的遗传变异、性状相关性及主成分进行了分析。结果表明:江苏省不同品种的白沙枇杷各生物学特性间存在着较高的遗传变异,变异系数最大的是侧枝长度为44.1%,9个生物学特性变异系数大小依次为侧枝数(44.1%)>侧枝长度(36.1%)>叶柄长度(26.7%)>中心枝长度(25.0%)>侧枝粗度(22.0%)>叶柄宽度(13.1%)>叶片宽度(12.9%)>中心枝粗度(11.9%)>叶片长度(10.5%),各生物学特性之间不是相互独立的,而是存在着较为广泛的联系,相关系数最高的性状是侧枝长度和侧枝粗度(0.83);主成分分析将白沙枇杷的9个生物学特性划为4个主成分,其累计贡献率为83.58%,高度相关因子的贡献率高达43.72%。
In this paper, the 16-year-old grafted tree collected from 20 loquat cultivars collected from loquat germplasm resource garden of Taihu Lake evergreen fruit tree technology promotion center in Jiangsu Province was used as test material to study the genetic variation of 9 biological characteristics of 20 loquat germplasm resources , Trait correlation and the main components were analyzed. The results showed that there was a high genetic variation among different varieties of loquat in Jiangsu Province. The largest variation coefficient was 44.1% in collateral length, and the other nine biological characteristics were in the order of collateral number (44.1%), > Length of branch (36.1%)> Length of branch (26.7%)> Length of central branch (25.0%)> Branch thickness (22.0%)> Petiole width (13.1%)> Leaf width (12.9% 11.9%)> the length of leaves (10.5%). The biological characteristics were not independent of each other, but there was a wide range of correlations. The highest correlation coefficient was the length of collateral branches and collaterals (0.83) The nine biological characteristics of Pak Loquat were divided into four main components, the cumulative contribution rate was 83.58%, the highly relevant factor contribution rate as high as 43.72%.