热带农业科学2025，Vol.45Issue(1)：17-25,9.DOI:10.12008/j.issn.1009-2196.2025.01.004
番石榴杂交后代叶片性状遗传规律研究
Study of the Inheritance of Leaf Traits in the Hybridized Progeny of Psidium guajave
摘要
Abstract
To explore the separation law of leaf phenotypic traits in the hybrid offspring of guava,this study conducted a diversity analysis on the genetic characteristics of leaf traits in the hybrid offspring of 8 guava hybrid combinations.The re-sults revealed that the genetic dominance rates of leaf length,leaf width,leaf thickness,and leaf area in the hybrid offspring of guava were all negative,indicating a strong genetic tendency toward reduction.The mean leaf shape index of offspring is mostly higher than the mid-parent value,and the population dominance rate is positive,indicating strong heterosis.The leaf qualitative traits of hybrid offspring were significantly different among different individual plants.However,the leaf shape,color,upper surface smoothness,base shape,and tip shape of the offspring were mainly inherited from the parents,with a population genetic frequency higher than 50%.The Shannon‒Weinner index(Hʹ)of the five leaf qualitative traits in the hybrid offspring ranged from 0.69 to 0.94,and leaf color presented the highest genetic diversity.However,the shape of the leaf tip was relatively poor.The shape of the leaf,the smoothness of the upper surface,and the shape of the leaf base were moderate.These results provide a theoretical reference for the comprehensive evaluation and early identification of excellent fruit traits of guava hybrid offspring.关键词
番石榴/杂交/叶片性状/遗传多样性Key words
Psidium guava/hybridization/leaf traits/genetic diversity分类
农业科技引用本文复制引用
黄婉莉,张朝坤,张冬敏,符喜喜,陈心怡..番石榴杂交后代叶片性状遗传规律研究[J].热带农业科学,2025,45(1):17-25,9.基金项目
福建省科技计划项目(No.2022N0045) （No.2022N0045）
漳州市科技计划项目(No.ZZ2024J02). （No.ZZ2024J02）
