文献类型： 外文期刊
作者： Liu, Wenqiang 3 ; Meng, Qiucheng 2 ; Weng, Lushui 2 ; Peng, Jian 4 ; Xiao, Youlun 5 ; Yu, Jianghui 2 ; Yi, Zili 1 ; Xiao, 1 ;
作者机构： 1.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Hunan, Peoples R China
2.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China
3.Hunan Acad Agr Sci, Hunan Rice Res Inst, Changsha 410125, Hunan, Peoples R China
4.Changde Res Inst Agr Sci, Changde 415000, Peoples R China
5.Hunan Acad Agr Sci, Hunan Plant Protect Inst, Changsha 410125, Hunan, Peoples R China
关键词： Oryza stativa;Hybrid;Cry2Aa(;);Rice leaf roller
期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）
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收录情况： SCI
摘要： In our previous study, an early season rice restorer line B2A68 expressing Cry2Aa(#) gene was obtained. In order to evaluate the performance of B2A68's hybrids, a total of six hybrids from crossing B2A68 with six thermo-sensitive genic male sterile (TGMS) lines of early season rice were compared for expression level of Cry2Aa protein, as well as in insect resistance, agronomic traits and grain quality with their non-Bt null controls. Our results showed that the highest Cry2Aa protein content among B2A68's hybrids was detected in leaf, where the Cry2Aa content was nearly three times of that in stem. The Cry2Aa content of B2A68 was significantly higher than those of its derived hybrids, indicating the Cry2Aa(#) gene was incompletely dominant in hybrids. The hybrids with Cry2Aa(#) gene exhibited higher plant protection against rice leaf roller than the hybrids without Cry2Aa(#) gene in field. Significant differences were observed in plant height, panicle length, number of grains per panicle, seed set, 1000-grain weight and yield per plant between hybrids with Cry2Aa(#) gene and hybrids without Cry2Aa(#) gene in 2013 or 2014. There were significant differences in chalky grain rate and chalkiness degree between paternal lines B2A68 and D68, and between hybrids with Cry2Aa(#) gene and hybrids without Cry2Aa(#) gene. All of the differences in agronomic traits and grain quality varied among parental lines and hybrids. In this paper, three hybrids with high lepidopteran resistance, high yield, elite agronomic traits and acceptable grain quality was selected out, that could serve as elite resistant hybrids to control lepidopteran pests in early season rice production. (C) 2015 Elsevier B.V. All rights reserved.
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