甬优系列杂交稻组合开花期耐冷性评价  

Evaluation of Chilling Resistance in Yongyou Series of Hybrid Rice at Flowering Stage

作　　者：曾研华[1,2] 张玉屏[2] 王亚梁 向镜[2] 陈惠哲[2] 朱德峰[2] 

机构地区：[1]南京农业大学农学院,南京210095 [2]中国水稻研究所水稻生物学国家重点实验室,杭州311400

出　　处：《中国水稻科学》2015年第3期291-298,共8页Chinese Journal of Rice Science

基　　金：浙江省自然科学基金资助项目(Y13C130013);中央级公益性科研院所基本科研业务费专项(2012RG004-2);现代农业产业技术体系建设专项(CARS-01-09B)

摘　　要：以籼粳杂交稻甬优系列及杂交籼稻钱优2号和常规粳稻浙粳88为材料,于主茎见穗开花日起,用人工气候箱低温(17℃)和适温(25℃)分别处理4d和7d,以室外自然温度为对照,研究不同籼粳成分水稻低温胁迫下籽粒的结实特性。结果表明,低温处理显著降低甬优系列的籽粒结实率和穗重,低温胁迫效应以处理7d较大。按照耐冷性指数来划分,甬优538、浙粳88、甬优10号、甬优6号和甬优15号为耐冷型,甬优8号、甬优12号、甬优9号和甬优17号为冷敏感型,其余为中间型。此外,甬优系列耐冷型与冷敏感型籼粳成分并无明显的差异。进一步分析表明,低温处理7d,相对冷敏指数与水稻结实率和空粒率极显著相关(r=-0.9552,0.9602)。Yongyou series （indica-japonica hybrid rice）and Qianyou 2 （indica hybrid rice）,Zhejing 88 （inbred japonica rice）were subjected to low temperature stress （1 7℃）and normal temperature treatment（25 ℃）for 4 days and 7 days in phytotron to investigate the grain filling characteristics during flowering stage with the ambient temperature as control.The results showed that seed setting rate and grain yield per panicle of Yongyou series were decreased significantly under low temperature treatment,especially under the 7-day chilling stress.Based on the cold resistance index,Yongyou 538,Zhejing 88,Yongyou 10,Yongyou 6,Yongyou 1 5 were chilling tolerant lines,Yongyou 8, Yongyou 12,Yongyou 9,Yongyou 1 7 were chilling sensitive ones,and the others were intermediate type.There was no significant difference in the ratio of indica and japonica background between chilling tolerant lines and chilling sensitive ones.The correlation analysis indicated that under 7-day of chilling stress,the relative cold sensitivity index was significantly correlated with seed setting rate and grain sterility rate at the 0.01 probability level with the correlation coefficients of -0.9552 and 0.9602,respectively.

关 键 词：籼粳杂交稻 甬优系列 耐冷性 籼粳成分 

分 类 号：S511[农业科学—作物学]