文献类型：期刊文献

中文题名：两个新籼稻光温敏核不育系的育性转换特性研究

英文题名：Studies on the Characteristics of Fertility Alteration in Two New Indica Rice of Photo-Thermo Sensitive Genic Male Sterile Lines

作者：魏荷[1];郭建夫[1];王丰青[2];黄永相[1];朱宏波[1]

机构：[1]广东海洋大学农业生物技术研究所;[2]广东海洋大学工程学院,广东湛江524088

年份：2006

卷号：22

期号：12

起止页码：157

中文期刊名：中国农学通报

外文期刊名：Chinese Agricultural Science Bulletin

收录：CSTPCD、、CSCD_E2011_2012、CSCD

基金：广东省"十五"重大科技专项"优质超级杂交稻育种研究"(2003A2010101)

语种：中文

中文关键词：籼稻;光温敏核不育系;温度敏感期;临界温度

外文关键词：Indica flee, Photo-Thermo Sensitive Genie Sterile Male Line, Temperature sensitive period, Critical temperature

中文摘要：为了研究新育成的水稻光温敏雄性不育系H61S、H69S的育性转换特性,于2005—2006年在湛江进行了分期播种试验和人工控制光温试验,结果表明:(1)温度是引起两个光温敏不育系育性转换的最主要的原因,光照时数对不育系育性影响不显著。(2)H61S、H69S的育性温度敏感期分别为抽穗前19￣10d和20￣10d,最敏感期均为抽穗前17￣13d,与对照培矮64相似。(3)当不育系由不育转为可育,可育花粉率达1%时,H61S、H69S和对照培矮64S的育性转换临界温度分别为24.2℃、25.3℃、26.1℃。(4)两个不育系在湛江自然播种条件下都有较长的稳定不育期和较高的自交结实率,育性转换期均比对照培矮64S短,可以安全制种,也可繁殖,但适宜繁殖的抽穗期范围窄。

外文摘要：In order to study the characteristics of fertility alteration in two new Photo-Thermo Sensitive Genie Male Sterile （P/TGMS） lines, H61S and H69S were observed under controlled conditions and natural conditions by ways of different sowing dates in 2005-2006. The results showed that： （1） Day-length had no obvious influence on fertility transition for the two P/TGMS lines, while temperature was the main factor of fertility transition. （2） The sensitive stages of temperature on fertility expression for H61S and H69S which were 19-10d and 20-10d before heading respectively, were similar to Pei＇ai64S （20-19d）, and the most sensitive periods were 17-13d for all the three male sterile lines above. （3） The critical temperatures were 24.2℃, 25.3℃, 26.1℃ for H61S, H69S and Pei＇ai64S （cK） respectively when the fertile pollen rates was one percent. （4） The two P/TGMS lines had high self-setting rate and long stable sterile period, and so they could be multiplied and produced hybrid-seeds safely, but their fertile periods were short in Zhanjiang. Compared with Pei＇ai64S （oK）, the periods of fertility alteration for H61S and H69S were shorter.