|Table of Contents|

Construction Strategy of Large Fruit Tomato Core Germplasm Based on Genotype Value

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年15
Page:
8-14
Research Field:
Publishing date:

Info

Title:
Construction Strategy of Large Fruit Tomato Core Germplasm Based on Genotype Value
Author(s):
HE Huang; YANG Yan; NIU Yu; LIU Ziji
(Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou,Hainan 571101)
Keywords:
large fruit tomato; genotype value; genetic distance; sampling method; clustering method; core germplasm
PACS:
-
DOI:
10.11937/bfyy.20194717
Abstract:
185 large fruit tomato germplasm were taken as materials,the genotype values of 7 traits were predicted unbiased by mixed linear model analysis method.Based on genotype values,2 genetic distances,8 clustering methods,three sampling methods and 30% sampling proportion were used to construct the core germplasms of large fruit tomato.The core germplasms were evaluated based on mean,variance,range and variation coefficient.In order to construct core germplasm and facilitate the evaluation and innovation utilization of germplasm resources.The results showed that Mahalanobis distance was superior to Euclidean distance.The core germplasm constructed by the Single linkage could significantly improve the variance and variation coefficient of traits that was superior to the other 7 clustering methods.The core germplasm of large fruit tomato constructed by Deviation sampling had relatively large genetic variation,which was superior to Preferred sampling and Random sampling.The 55 core germplasm of large fruit tomato selected based on Mahalanobis distance,Single linkage,Deviation sampling and 30% sampling proportion could fully represent the genetic diversity of the initial population.This study laid a foundation for the collection,preservation and innovation utilization of large fruit tomato germplasm.

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Last Update: 2020-09-16