太湖地区粳稻地方种质资源的表型多样性分析与评价

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中图分类号：S511.024 文献标识码：A 文章编号：1000-4440（2025）07-1249-11

doi：10.3969/j.issn.1000-4440.2025.07.001

Phenotypic diversity analysis and evaluation japonica rice germplasm resources in the region

CAO Penghui，YU Yajie，SONG Yunsheng，CHEN Fei，XIE Yulin，DONG Minghui，QIAO Zhongying，

Abstract：In order to understand and evaluate the genetic diversity level japonica rice germplasm resources in he region，and broadenthebasis geneticselection parents injaponicarice breeding，thediversityandcomprehensiveevaluation13phenotypic traits2O6japonicaricegermplasmresouces intheregionwereanalyzedinthis study.Theresultsshowedthatthecoeficientvariation13phenotypic traits 2O6 japonica ricegermplasm resources was 2.33%-23 .43 % ，and the diversity index was ，indicating that the genetic diversity japonica rice germplasmresources in the region was abundant.Thecumulativecontributionrate thefirst seven principal components 13 phenotypic traits was 86.89% ，which contained most the genetic information and represented the basic characteristics japonica ricegermplasmresources inthe Taiu region.Thesixphenotypic traits，including whole growth period duration，flag leaf length，plant height，panicle length，total grain numberperpanicleandgrain length-to-width ratio，significantlyaffected the comprehensive evaluation D value and could be used as the key indicators for the evaluation japonica rice germplasm resources in the region.The 2O6 japonica rice germplasm resourceswereclustered into three groups，and the comprehensive traits the group II were the best.

Key words： japonica rice； germplasm resources; phenotypic diversity；comprehensive evaluation

水稻是中国最重要的粮食作物之一，全国超过半数的人口以稻米为主食[1]。（剩余10124字）