福建农业学报2026，Vol.41Issue(6)：645-652,8.DOI:10.19303/j.issn.1008-0384.2026.06.001
籼粳衍生系杂交稻光合特性与水分利用效率遗传解析
Genetics Related to Photosynthesis and Water Use Efficiency of Indica-Japonica Hybrids
摘要
Abstract
[Objective]Genetics related to the photosynthesis and water use efficiency(WUE)of indica-japonica hybrids was studied.[Methods]Sixty indica-japonica hybrids were obtained by crossing 5 indica-type cytoplasmic male-sterile(CMS)lines with 12 indica-japonica derived restorer lines using the North Carolina Ⅱ(NCⅡ)mating design.Photosynthetic parameters and WUE were measured on flag leaves at full heading stage of the plants.[Results]Substantial genetic variations existed on all target traits of the hybrids.The non-additive effects accounted predominately for 63.30%-75.92%of the total genetic variance.The remaining 24.08%-36.70%additive effects were primarily derived from the restorer lines and insignificantly from the sterile lines.The broad-sense heritability was high at 83.46%-98.08%,while the narrow-sense heritability was low at 20.79%-36.03%.The path coefficient analysis showed Tr to exert the strongest positive direct effect on Pn of 0.532,and WUE a weak negative direct effect of-0.131.Pn significantly and positively correlated to the seed-setting rate with a Pearson correlation coefficient(r)of 0.352,to the filled grains per panicle with an r of 0.277,and to the grain yield per plant with an r of 0.341.[Conclusion]Targeting the physiological indicators of a high Ci,a low-to-moderate Gs,and strong Tr direct effect on Pn,a high-yield rice variety efficient in photosynthesis and water utilization could possibly be bred by crossing Minghui 398 or Minghui 417 with Minghui 502.关键词
杂交水稻/籼粳衍生系/光合特性/水分利用效率/遗传效应/遗传力/高光效育种Key words
hybrid rice/indica-japonica hybrids/photosynthetic traits/water use efficiency/genetic effects/heritability/high-photosynthetic efficiency breeding分类
农业科技引用本文复制引用
杨旺兴,卓伟,候新坡,马彬林,邹文广,许旭明..籼粳衍生系杂交稻光合特性与水分利用效率遗传解析[J].福建农业学报,2026,41(6):645-652,8.基金项目
国家现代农业产业技术体系建设专项(CARS-01) （CARS-01）
福建省种业创新与产业化工程项目(zycxny2021004) （zycxny2021004）
福建省科技引导项目(2022N0038) （2022N0038）
三明市科技计划项目(2023-N-5) （2023-N-5）
