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Discussion on strategy of grain quality improvement for super high yielding japonica rice in Northeast China
Alternative TitleDiscussion on strategy of grain quality improvement for super high yielding japonica rice in Northeast China
Mao Ting1; Li Xu2; Jiang Shukun3; Tang Liang1; Wang Jiayu1; Xu Hai1; Xu Zhengjin1
2017
Source PublicationJOURNAL OF INTEGRATIVE AGRICULTURE
ISSN2095-3119
Volume16Issue:5Pages:1075-1083
Abstractjaponica 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.connplicated 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 (NRT1.113) 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 relitively 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.
Other Abstractjaponica 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.
KeywordSUBSPECIES DIFFERENTIATION RILS POPULATION EATING QUALITY ENCODES TRAITS QTL COOKING WEIGHT INDICA WIDTH super rice indica-japonica hybridization genetic dissection quality improvement
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Cultivation Plan for Youth Agricultural Science Technology Innovative Talents of Liaoning Province, China] ; [Program for Changjiang Scholars and Innovative Research Team in University, China]
CSCD IDCSCD:5991333
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/155159
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.Liaoning Institute Saline Alkali Land Utilizat, Panjin 124010, Peoples R China
3.Heilongjiang Acad Agr Sci, Cultivat & Farming Res Institute, Harbin 150086, Peoples R China
Recommended Citation
GB/T 7714
Mao Ting,Li Xu,Jiang Shukun,et al. Discussion on strategy of grain quality improvement for super high yielding japonica rice in Northeast China[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2017,16(5):1075-1083.
APA Mao Ting.,Li Xu.,Jiang Shukun.,Tang Liang.,Wang Jiayu.,...&Xu Zhengjin.(2017).Discussion on strategy of grain quality improvement for super high yielding japonica rice in Northeast China.JOURNAL OF INTEGRATIVE AGRICULTURE,16(5),1075-1083.
MLA Mao Ting,et al."Discussion on strategy of grain quality improvement for super high yielding japonica rice in Northeast China".JOURNAL OF INTEGRATIVE AGRICULTURE 16.5(2017):1075-1083.
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