双季稻栽培对水稻DUS测试标准品种数量性状表达的影响  

Effects of Double-Cropping Rice Cultivation on the Expression of Quantitative Characteristics of Rice DUS Testing Example Varieties

作　　者：凌晨 刘洪[1] 杨哲 黄展权 陈孟强 饶得花[1] 徐振江[1] Ling Chen;Liu Hong;Yang Zhe;Huang Zhanquan;Chen Mengqiang;Rao Dehua;Xu Zhenjiang(College of Agriculture,South China Agricultural University,Guangzhou 510642,Guangdong,China)

机构地区：[1]华南农业大学农学院,广东广州510642

出　　处：《作物杂志》2021年第4期18-25,共8页Crops

基　　金：农业农村部物种品种资源保护项目(111821301354051010)。

摘　　要：通过田间试验,对《水稻DUS测试指南》中21个标准品种的13个数量性状进行早晚季性状观测分析,结果表明,受早晚栽培季节影响程度最大的3个性状依次是千粒重、茎秆长和穗粒数,茎秆直径受影响程度最小;各数量性状对应的标准品种受早晚栽培季节影响程度最大的是竹云糯,其次是桂花黄和元子占稻,川7号和矮糯受影响程度最小;单株穗数和结实率对应的标准品种早晚季表现一致性较差,提出将单株穗数代码为7的陆川早1号更换为Tsukushiakamochi,结实率代码为7的Dasanbyeo更换为特矮选的标准品种优化建议;依据晚季水稻的分级范围对部分早季水稻的数量性状进行调整,调整后各标准品种分级代码早晚季水稻表现出较好的一致性。Based on the field experiment, the effects of different cultivation seasons on the expressions of 13 quantitative characteristics of 21 rice varieties listed in the Rice DUS Test Guidelines were analyzed. The results showed that the three quantitative characteristics of 1000-grain weight, stem length, and grains per ear were greatly influenced by the early and late seasons and stem diameter was the least affected characteristic. Among all the rice varieties, ‘Zhuyunnuo’ was the most affected variety by the early and late seasons, followed by ‘Guihuahuang’ and ‘Yuanzizhan’, while ‘Chuan 7’ and ‘Ainuo’ was the least affected. Two rice varieties corresponding to the characteristic of ears per plant and seed setting rate had poor consistency in early and late seasons and proposing to replace ‘Luchuanzao 1’ with ears per plant on code 7 to ‘Tsukushiakamochi’, and replace ‘Dasanbyeo’ with seed setting rate on code 7 to ‘Teaixuan’ of optimization suggestions for rice varieties. The quantitative characteristics of the early season were adjusted according to the grading range of the late season, the adjusted grading codes of each standard variety showed good consistency in the early and late seasons.

关 键 词：栽培季节 水稻 标准品种 数量性状 DUS测试 

分 类 号：S511.42[农业科学—作物学]