190份大白菜自交系的遗传多样性分析及育种应用

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中图分类号：S634.1 文献标志码：A 文章编号：1673-2871（2025）08-026-1

Genetic diversity analysis and breeding application of 19o high inbred lines of Chinese cabbage

（1.Vegetableeahuteadeficutualecegooain;ifenef Agriculturested

Abstract：Inordertoanalyze the majorphenotypic traitsandgeneticdiversityof190high-generation inbredlinesderived from26parentallines，andevaluatetheirpotentialforbreedingapplications，thisstudyconductedvariationandcorrelationanalysis on27majorphenotypic traitsof thetest materials，along with genetic diversityanalysis basedon27pairs InDel markers.The results showed that the variation coefficient of the27 phenotypic traits ranged from 10.10% to 90.36% ， indicatingsubstantialvariability，withsignificantcorelationsobservedamongmultipletraits.TheInDelmarkeranalysis revealed thatthepolymorphism informationcontentranged fromO.01toO.37，and thegeneticsimilaritycoefficient among the190high-generation inbred linesvariedbetween 0.57and1.00，withanaverageof0.65，suggestingconsiderablegeneticvariation within thepopulation.Basedon InDelmarkersand population structureanalysis，thetestmaterials could be divided into three subgroups，withthe progenyderived from16-Autumn introduced from eastern suburbs Band KaishuNo.7exhibiting greatersegregation.Inconclusion，the190Chinesecabbage inbred linesused inthis studyexhibit broad phenotypicvariation andrich genetic diversity，providing valuable germplasm resourcesandtheroetical support for parental selection and the development of superior trait combinations in Chinese cabbage breeding.

KeyWords：Chinese cabbage;Phenotypic trait;Genetic diversity; InDel marker

大白菜（Brassica rapaL.ssp.pekinensis）为原产于我国的十字花科芸墓属芸墓种的一个亚种，年种植面积约180万 hm2 ，在我国蔬菜产业中占有重要地位[1-2]。（剩余10443字）