华北农学报2025，Vol.40Issue(z1)：29-39,11.DOI:10.7668/hbnxb.20195296
薄皮甜瓜果实形状相关性状主基因+多基因遗传分析
Mixed Major Gene+Polygene Genetic Analysis of Fruit Shape-related Traits in Oriental Melon
摘要
Abstract
The study aimed to explore the genetic mechanism of fruit shape in oriental melon.The parents,M125(Elongate)and M30(Near round),were used to build the six generation populations,and the genetic patterns of fruit longitudinal diameter,transverse diameter,and shape index were studied using the method of main gene+multiple gene generation analysis.The results showed that significant positive correlation between fruit longitudinal diameter and shape index,and the correlation values were high in 2021-2023.In three years,the genetic models of fruit longitudinal diameter,transverse diameter,and shape index were MX2-ADI-ADI,two pairs of additive-domi-nant-epistatic master genes+additive-dominant-epistatic polygenes.In the first-order genetic parameters,the addi-tive effect values of the two main genes controlling the fruit longitudinal diameter,transverse diameter,and shape in-dex were equal and positive in the three years(da=db＞0),and it had a synergistic effect.The absolute value of the dominant effect of the first pair of major genes controlling fruit longitudinal diameter in 2021 and 2023 was signifi-cantly higher than that of the second pair of major genes,while the dominant effect of the second major gene was slightly higher than that of the first pair of major gene in 2022.The additive effects of the two pairs of major genes controlling fruit transverse diameter showed little variation across different years and were all negative,indicating that the dominant effects of the major genes had a negative impact on fruit diameter.The absolute value of the domi-nant effect of the first pair of major genes controlling fruit shape index was greater than that of the second pair of major genes,indicating that the first pair of major genes played a leading role in the dominant effects.The second-order genetic parameters showed that in the F2,from 2021 to 2023,the heritability of main genes for fruit longitudi-nal diameter was 81.51％,72.16％,80.77％,respectively.The heritability of major genes for transverse diameter was 77.88％,69.94％,65.90％,respectively.The heritability of main genes for fruit shape index was 80.41％,70.81％,82.49％,respectively.The inheritance of the three fruit shape traits in Oriental melon is quantitative traits,and the heritability of major genes in F2 generation was high.Therefore,the three fruit shape traits were select-ed in early generations during the oriental melon breeding.关键词
薄皮甜瓜/果形相关性状/主基因+多基因/遗传分析Key words
Oriental melon/Fruit shape-related traits/Major gene+polygene/Genetic analysis分类
农业科技引用本文复制引用
陈英达,贾伟嵘,孙浩,潘玉朋,张丽娟,徐蒙,刘振宁,张宁..薄皮甜瓜果实形状相关性状主基因+多基因遗传分析[J].华北农学报,2025,40(z1):29-39,11.基金项目
临沂大学博士人才科研启动项目(LYDX2020BS026) （LYDX2020BS026）
临沂大学大学生创新创业训练计划项目(X202410452458) （X202410452458）
山东省高等学校青创科技计划创新团队(2021KJ055) （2021KJ055）
国家自然科学基金项目(32260778) （32260778）
