光温敏不育水稻育性临界温度的初步研究  

PRELIMINARY STUDY ON THE FERTILITY CRITICAL TEMPERATURE OF PHOTO PTHERMO- SENSITIVE STERILE RICE LINES

作　　者：谢国生[1] 杨书化[1] 万经猛[1] 李泽炳[1] 

机构地区：[1]华中农业大学农学系

出　　处：《华中农业大学学报》1997年第3期226-230,共5页Journal of Huazhong Agricultural University

基　　金：八六三高技术研究发展计划资助

摘　　要：在人工气候室长日低温（昼／夜：２４℃／２０℃，光长１４．５ｈ）和武汉自然短日高温条件下，分别研究了７个光温敏不育系育性临界温度。结果表明，供试光温敏不育系对低温敏感期大致为雌雄蕊形成期至花粉母细胞减数分裂期，以套袋结实率为指标时，长日不育的下限温度次序为Ｗ６１５４ｓ＞Ｗ７４１５ｓ，Ｎ５８ｓ＞３３００１ｓ，Ｎ５０４７ｓ，３１１１１ｓ，Ｎ５０８８ｓ；在武汉秋季自然短日高温条件下，粳型光敏不育系Ｎ５８ｓ，３３００１ｓ，Ｎ５０８８ｓ和Ｎ５０４７ｓ的套袋结实率与抽穗前２０～１０ｄ的日均温呈显著负相关，３１１１１ｓ的套袋结实率也与其抽穗前１５～５ｄ的日均温呈显著负相关，短日可育上限日均温范围为２８．７６～３２．３８℃，各品种次序为３３００１ｓ＞Ｎ５０８８ｓ＞Ｎ５０４７ｓ＞Ｎ５８ｓ＞３１１１１ｓ。Fertility critical temperature of photoperiod-thermo sensitive sterile rice lines tested had been studied,under phytotron long daylight and low temperature conditions, as well as Wuhan autumn natural short daylight and high temperature conditions respectively. The results demonstrated that, the low temperture sensitive stages of photoperiodthermo sensitive sterile lines were roughly from stamen and pistil primordium formation to pollen mother cell meiotic division stage. In terms of bagged set seed percentage, the minimum temperature order of long daylight sterility was W6154s; W7415s, N58s; 33001s; N5047s, 31111s, N5088s; Under Wuhan autumn natural short daylight and high temperature conditions, the bagged set seed percentage of japonical photoperiod sensitive sterile rices such as N58s, 33001s, N5088s and N5047s was significantly negative correlated with the day mean temperatuare of twenty to ten days before heading. And moreover, that of 31111s was significantly negative correleted to the day mean temperature of fifteen to five days before heading, daily mean tempereture spectrum of fertility, under short daylight conditions, was between 28.76℃ and 32.38℃. The sequenee of that was 33001s, N5088s, N5047s, N58s, 31111s.

关 键 词：光温敏不育 水稻 温度 磁袋结实率 

分 类 号：S511.035.1[农业科学—作物学]