福建农业学报2025，Vol.40Issue(2)：123-131,9.DOI:10.19303/j.issn.1008-0384.2025.02.002
紫薇和福建紫薇杂交群体株型性状遗传分析
Genetics of Lagerstroemia indica×L.limii Phenotype
摘要
Abstract
[Objective]Genetics on the phenotype of Lagerstroemia limii was studied to breed improved hybrids with'Qianceng Feixue'.[Method]Populations of hybrids between the tree-type L.limii(FJ)and the shrub-type'Qianceng Feixue'(QC)were generated for the study.Seven phenotype traits including the height,diameter,and length of 1st branch of one-year-old plants were measured for correlation analysis among them.Major gene+polygene inheritance models were tested for best fitting in predicting hybrid phenotype.[Result](1)The plant height of the hybrid progenies ranged 1.50-24.5 cm,the trunk diameter 0.30-4.44 mm,the 1st branch length 0.50-6.20 cm,and the branch number 0-4.These traits were basically in a normal distribution pattern among the hybrids with potential arborescent germplasms.(2)The coefficients of variation on the 7 traits were 31.72%-240.42%with the greatest on the number of branches and the least on the height of the first branch in the QC×FJ population.The coefficients of variation of primary branching point height,opening angle,and lateral branching GSA were larger in the FJ×QC population than in the QC×FJ population,and the FJ×QC group tended to show higher plant height,thicker ground diameter,and more branches,indicating that the hybrid progeny of L.limii as the mother plant had richer strain variation.(3)The plant height significantly correlated with the trunk diameter,the number with the angle of the branches,and the angle with the GSA of the branches.(4)The best fit model for the plant height,trunk diameter,and branching angle was 2MG-AD,and that for the branch GSA and 1st branch length 2MG-EA.[Conclusion]L.limii(FJ)appeared to be a plausible candidate for breeding hybrids with L.indica(QC)that could inherit the desirable phenotypes of growing vigorously,being free of branches on base of trunk,and showing the main trunk prominently.关键词
紫薇/远缘杂交/株型/遗传分析Key words
Lagerstroemia/distant hybridization/phenotype traits/genetic analysis分类
生物学引用本文复制引用
江欣蔚,黄佳玉,徐玉,申梦娇,蔡明,潘会堂..紫薇和福建紫薇杂交群体株型性状遗传分析[J].福建农业学报,2025,40(2):123-131,9.基金项目
国家重点研发计划项目(2019YFD1001004) （2019YFD1001004）
