广西常用杂交水稻及其恢复系对短日照处理的反应(英文)

Reaction to short photoperiod treatment of common rice hybrids and their restorer lines in Guangxi

在2004年初步试验的基础上,选用了广西常用的感温和感光型杂交水稻组合和恢复系及两个常规稻共16份材料在2005年继续进行短日照处理,以观察短日照处理对一些主要农艺性状的影响。结果显示,短日照处理明显缩短了感光型材料的生育期,减少了主茎叶片数和平均每穗总粒数。短日照处理降低了感光型材料的单株产量,但遮光提高了感温型材料的单株产量。在本试验中,无论是感温型还是感光型材料,短日处理对它们的株高、穗长、实粒数、结实率、千粒重和小区产量都没有大的影响。

Based on the previous results obtained in 2004, total sixteen entries including rice hybrid combinations and their restorer lines and some inbred lines, were tested in 2005 for the reaction to short day length treatments to know the changes of some main agronomic traits. The results showed that the short day length treatments could significantly shorten the growth duration of photo-sensitive type hybrids and inbred lines, and meanwhile reduce the leaf number of the main stem and the grain number per panicle of them. For the thermo-sensitive entries, the single plant yield of CK was the lowest compared to other different treatments. But for the photo-sensitive materials, the yield of CK was higher or the highest compared to other treatments. There were no regularly effects on plant height, panicle length, filled grain number, seed setting rate, 1000-grain weight and plot yield, either with treatments or CK for both thermo-sensitive and photo-sensitive ones in this study.