火龙果种质资源果实特性的遗传多样性分析
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摘要
为筛选火龙果(Hylocereus undatus)优良种质资源,对22份种质资源果实的表型性状、农艺性状、品质性状进行遗传多样性分析。结果表明,火龙果种质资源果实的表型性状、农艺性状和品质性状具有丰富的遗传多样性和较高的变异性,表型性状的多样性指数(H′)为0～1.04,品质性状为0.40～2.01;农艺性状的变异系数(CV)为0.06～0.38,品质性状为0.01～0.62。聚类分析表明,在遗传距离为15时,火龙果22份种质资源可分为5类,说明不同资源间亲缘关系较远。这为发掘火龙果的育种潜力,筛选优异基因资源,改良种质奠定了基础。
In order to screen excellent germplasm of Hylocereus undatus, the fruit genetic diversity analysis in phenotypic traits, agronomic traits and quality traits of 22 germplasms were studied. The results showed that the phenotypic, agronomic and quality traits of H. undatus fruit had abundant genetic diversity and high variability.The diversity indexes(H') of fruit phenotypic and quality traits were 0-1.04 and 0.40-2.01, respectively. The coefficient of variation(CV) of agronomic traits and quality traits were 0.01-0.62 and 0.06-0.38, respectively.Cluster analysis showed that 22 germplasms of H. undatus could be devided into 5 groups at genetic distance of15, indicating that different germplasms were far related. These would lay a foundation for exploring the breeding potential of H. undatus, screening excellent genetic resources and improving germplasm.
In order to screen excellent germplasm of Hylocereus undatus, the fruit genetic diversity analysis in phenotypic traits, agronomic traits and quality traits of 22 germplasms were studied. The results showed that the phenotypic, agronomic and quality traits of H. undatus fruit had abundant genetic diversity and high variability.The diversity indexes(H') of fruit phenotypic and quality traits were 0-1.04 and 0.40-2.01, respectively. The coefficient of variation(CV) of agronomic traits and quality traits were 0.01-0.62 and 0.06-0.38, respectively.Cluster analysis showed that 22 germplasms of H. undatus could be devided into 5 groups at genetic distance of15, indicating that different germplasms were far related. These would lay a foundation for exploring the breeding potential of H. undatus, screening excellent genetic resources and improving germplasm.
引文
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