甘蔗糖业2026，Vol.55Issue(1)：1-8,8.DOI:10.3969/j.issn.1005-9695.2026.01.001
甘蔗自交F1群体锤度性状遗传变异分析
Genetic Variation Analysis of Brix Trait in Sugarcane Self-pollinated F₁Populations
摘要
Abstract
Inbreeding depression typically reduces progeny fitness,while transgressive segregation enables offspring traits to surpass those of their parents.Conventional sugarcane breeding primarily develops new varieties by crossing elite parents,although inbreeding has also been employed to cultivate some important parental lines and superior varieties.In this study,five sugarcane parents(CP82-1529,Dezhe9388,Yuetang00236,Yunrui12399,and Yunzhe0551)characterized by early maturity and high sugar content were used to generate self-pollinated F1 populations.Brix values of the parents and populations measured in December were analyzed as trait indicators.The results revealed that the coefficient of variation for Brix in the self-pollinated F1 populations ranged from 6.78%to 10.21%,with no extreme high or low values observed.The frequency distributions showed continuous normal patterns,indicating that Brix is a quantitative trait controlled by multiple genes rather than a single gene.The mean Brix values of all five self-pollinated F1 populations were lower than those of their corresponding parents,demonstrating widespread inbreeding depression.However,transgressive segregants accounted for 0.54%to 6.31%of the self-pollinated F1 populations,with Brix values ranging from 21.17%to 22.83%.The maximum increase in individual plant Brix over the parental values varied from 0.41%to 1.51%(absolute values).Among the parents,Yuetang00236 exhibited the greatest transgressive potential and produced the highest proportion of transgressive segregants through selfing,highlighting its value as a key parental line for enhancing high-sugar traits in sugarcane.These findings provide a reference for utilizing self-pollinated F1 populations in sugarcane for selecting high-sugar transgressive individuals,optimizing cross combinations,developing specialized high-sugar parents,and conducting genetic research.关键词
甘蔗/自交F1群体/蔗糖分/遗传变异/评价Key words
Sugarcane/Self-pollinated F₁ population/Sucrose content/Genetic variation/Evaluate分类
农业科技引用本文复制引用
安汝东,俞华先,张钰,桃联安,边芯,郎荣斌..甘蔗自交F1群体锤度性状遗传变异分析[J].甘蔗糖业,2026,55(1):1-8,8.基金项目
云南省农业基础研究联合专项(202301BD070001-226) （202301BD070001-226）
云南省种子种业联合实验室项目(202205AR070001-13) （202205AR070001-13）
云南省农业科学院甘蔗种质创新及新品种选育省创新团队(2019HC013) （2019HC013）
国家糖料体系产业技术体系(CARS-17) （CARS-17）
