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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (5): 46-52.doi: 10.11924/j.issn.1000-6850.casb20190800556

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Genetic Variation Analysis and Genetic Parameters Estimation of Fruit Traits of Fine Family on Half-sib Families of Wild Litchi

Wu Jiefang, Ou Liangxi(), Chen Jiezhen, Cai Changhe, Yan Qian, Jiang Yonghua, Li Hua   

  1. Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences/ Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangzhou/Guangdong Province Key Laboratary of Tropical and Subtropical Fruit Tree Research, Guangzhou 510640
  • Received:2019-08-20 Revised:2019-11-18 Online:2020-02-15 Published:2020-02-21
  • Contact: Ou Liangxi E-mail:gdglxo@126.com

Abstract:

For clarifying the inheritance of wild litchi and providing a scientific basis for the selection of wine varieties, the phenotypic traits, quality traits and maturity genetic variation were analyzed by using the half-sib that produced by natural hybridization of 26 wild No.10 litchi. Results show that: the phenotypic traits of the fruit such as fruit shape, fruit shoulder shape, peel color, crack shape, and split peak shape vary widely, 3 to 5 different types are separated. In addition to the peel color, the inheritance of other traits is more stubborn. The proportion of maternal traits is: fruit shoulder shape (55.56%)> fruit shape (44.44%)> crack shape (40.74%)> split peak shape (29.63%)> peel color (14.81%). There are significant differences among the quality traits (P<0.01), and the coefficient of variation is: single fruit weight (28.44%)> fruit thickness (17.48%)> fruit thickness (15.44%)> edible rate (12.21%)> soluble solids content (8.8%)> fruit shape index (5.59%). For the heritability, the order is single fruit quality (0.9992)> the edible rate (0.9987)> soluble solids content (0.9753)> fruit shape index (0.9733)> flesh thickness (0.9663)> peel thickness (0.9585). For the genetic gain, the order is single fruit quality (87.74%)> fruit thickness (48.32%)> fruit thickness (30.16%)> edible rate (17.96%)> soluble solid content (14.37%)> fruit shape index(-4.77%). The single fruit weight has the highest coefficient of variation, heritability and genetic gain, showing outstanding results at these three indexes, indicating the trait is subject to stubborn genetic control, and has more possibilities in the choice of future generations. 9 specific individuals are selected, 8 single plants for high-solubility solid content (≥18.5%), and one single plant for high edible rate (≥80%), representing a good improvement effect.

Key words: wild litchi, half-sib families, fruit trait, genetic variation, genetic parameter

CLC Number: