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Discussion on strategy of grain quality improvement for super high yielding japonica rice in Northeast China

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Mao Ting 1   Li Xu 2   Jiang Shukun 3   Tang Liang 1   Wang Jiayu 1   Xu Hai 1 *   Xu Zhengjin 1  
文摘 japonica rice is mainly distributed in Northeast China and accounts for 44.6% of the total cultivated area of japonica rice in China. The comprehensive using of inter-subspecies heterosis is the main breeding mode of super japonica rice varieties in this region. Improving rice quality at relative high yielding level is the current research focus. Performing crosses between indica and japonica lines allows for the recombination of regulatory genes and genetic backgrounds, leading to complicated genetic rice quality characteristics, which can be used to explore patterns of quality improvement. In the present study, we utilize recombinant inbred lines (RILs) derived from indica-japonica hybridization to analyze the effect factors of rice quality derived from genetic factors, which contain both regulatory genes concerning rice quality and genetic backgrounds’ random introduction frequency coming from indica (Di value), and the improvement strategy was further discussed. The regulatory genes involved in amylase content (Wx) and nitrogen utilization efficiency (NRT1.1B) were the major factors affecting the amylose content (AC) and protein content (PC) in RILs, respectively. Both the Di value and the major grain width gene (GS5) had regulatory effects on milled rice width (MRW) in RILs, and their interaction explained the major variance of MRW in the RILs. With the mediation of MRW and chalkiness degree (C), Di value had a further impact on head rice rate (HR), which was relatively poor when the Di value was over 40%. In Northeast China, the Di value should be lowered by backcrossing or multiple crosses during the breeding of indica-japonica hybridization to maintain the whole better HR and further to emphasize the use of favorable genes in individual selection.
来源 Journal of Integrative Agriculture ,2017,16(5):1075-1083 【核心库】
DOI 10.1016/S2095-3119(16)61563-0
关键词 super rice ; indica-japonica hybridization ; genetic dissection ; quality improvement
地址

1. Rice Research Institute, Shenyang Agricultural University, Key Laboratory of Northeast Rice Biology and Breeding, Ministry of Agriculture;;Key Laboratory of Northern japonica Rice Genetics and Breeding, Ministry of Eduction, Shenyang, 110866  

2. Liaoning Institute of Saline-Alkali Land Utilization, Panjin, 124010  

3. Cultivation and Farming Research Institute, Heilongjiang Academy of Agricultural Sciences, Harbin, 150086

语种 英文
文献类型 研究性论文
ISSN 2095-3119
学科 农作物
基金 国家教育部长江学者与创新团队发展计划 ;  the Cultivation Plan for Youth Agricultural Science Technology Innovative Talents of Liaoning Province, China ;  sponsored by the National Natural Science Foundation of China
文献收藏号 CSCD:5991333

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引证文献 4 篇

1 Chen Wenfu 20 years’ development of super rice in China- The 20th anniversary of the super rice in China Journal of Integrative Agriculture,2017,16(5):981-983
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2 Hu Qun Effect of wide-narrow row arrangement in mechanical pot-seedling transplanting and plant density on yield formation and grain quality of japonica rice Journal of Integrative Agriculture,2020,19(5):1197-1214
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