自然高温胁迫对杂交水稻花粉育性和主要农艺性状的影响  

Influences of Natural High-temperature Stress on Pollen Fertility and Main Agronomic Traits of Hybrid Rice

作　　者：赵正武[1] 曾卓华 陈旭[1] 蒋晓英[1] 雷开荣[1] 姚南[3] 

机构地区：[1]重庆市农业科学院生物技术研究中心,重庆400055 [2]重庆市种子管理站,重庆401121 [3]重庆师范大学生命科学院,重庆400047

出　　处：《江西农业学报》2009年第8期19-21,共3页Acta Agriculturae Jiangxi

基　　金：重庆市科技合作项目(CSTC;2007AC1068);重庆市重点自然科学基金项目(CSTC;2008AB1029);重庆市重大专项(CSTC;2007AB1033CSTC;2007AA1019CSTC;2007AB1012)

摘　　要：利用重庆市2008年10个主推品种,以Ⅱ优838作对照,通过分期播种试验,研究了杂交水稻抽穗扬花期高温对花粉育性和千粒重、结实率及单株产量的影响。结果表明,参试品种花粉成活率均受高温影响,到35℃时显著下降,不同品种之间花粉育性存在较大的差异,Q优1号>冈优725>渝优1号>Q优6号>T优300>荆楚优735。高温对千粒重、结实率和单株产量均有较大影响,在抽穗扬花期间日均温33℃和34.5℃时影响最为严重。但是不同杂交水稻品种耐高温能力差异显著,渝优1号、冈优725、Q优1号表现出较强的耐高温能力。Using 10 main hybrid rice varieties popularized in Chongqing in 2008 as tested materials, and Ⅱ you 838 as the control, the influences of natural high - temperature stress at flowering stage on pollen fertility, 1000 - grain weight, seed setting rate and single -plant yield were studied by the way of time seeding. The results showed that pollen viability of tested varieties obviously decreased at 35 ℃. Different varieties had different pollen viability, they could be arranged as follows ： Qyou 1 〉 Gangyou725 〉 Yuyou 1 〉 Qyou 6 〉 Tyou 300 〉 Jinchuyou735. 1000 - grain weight, seed setting rate and single - plant yield were also influenced by high -temperature stress, especially when the daily average temperature at flowering stage was up to 33 -34.5 ℃ However, there were significant differences in high - temperature tolerance among tested hybrid rice varieties, and Yuyou 1, Gangyou 725 and Qyou 1 showed stronger tolerance to high temperature.

关 键 词：水稻 高温胁迫 花粉育性 农艺性状 千粒重 结实率 

分 类 号：S511[农业科学—作物学]