Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China

IMR OpenIR

	Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China
其他题名	Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China
	Liu Dan 1; Wang Jiayu 1; Wang Xiaoxue 1; Yang Xianli 1; Sun Jian 1; Chen Wenfu 1
	2015
发表期刊	JOURNAL OF INTEGRATIVE AGRICULTURE
ISSN	2095-3119
卷号	14 期号:5 页码:811-822
摘要	Abundant genetic diversity and rational population structure of germplasm benefit crop breeding greatly. To investigate genetic variation among geographically diverse set of japonica germplasm, we analyzed 233 japonica rice cultivars collected from Liaoning, Jilin and Heilongjiang provinces of China, which were released from 1970 to 2011 by using 62 simple sequence repeat (SSR) markers and 8 functional gene tags related to yield. A total of 195 alleles (N-a) were detected with an average of 3.61 per locus, indicating a low level of genetic diversity level among all individuals. The genetic diversity of the cultivars from Jilin Province was the highest among the three geographic distribution zones. Moreover, the genetic diversity was increased slightly with the released period of cultivars from 1970 to 2011. The analysis of molecular variance (AMOVA) revealed that genetic differentiation was more diverse within the populations than that among the populations. The neighbor-joining (NJ) tree indicated that cultivar clusters based on geographic distribution represented three independent groups, among which the cluster of cultivars from Heilongjiang is distinctly different to the cluster of cultivars from Liaoning. For the examined functional genes, two or three allelic variations for each were detected, except for IPA1 and GW2, and most of elite genes had been introgressed in modern japonica rice varieties. These results provide a valuable evaluation for genetic backgrounds of current japonica rice and will be used directly for japonica rice breeding in future.
其他摘要	Abundant genetic diversity and rational population structure of germplasm benefit crop breeding greatly. To investigate genetic variation among geographically diverse set of japonica germplasm, we analyzed 233 japonica rice cultivars collected from Liaoning, Jilin and Heilongjiang provinces of China, which were released from 1970 to 2011 by using 62 simple sequence repeat (SSR) markers and 8 functional gene tags related to yield. A total of 195 alleles (N_a) were detected with an average of 3.61 per locus,indicating a low level of genetic diversity level among all individuals. The genetic diversity of the cultivars from Jilin Province was the highest among the three geographic distribution zones. Moreover, the genetic diversity was increased slightly with the released period of cultivars from 1970 to 2011. The analysis of molecular variance (AMOVA) revealed that genetic differentiation was more diverse within the populations than that among the populations. The neighbor-joining (NJ) tree indicated that cultivar clusters based on geographic distribution represented three independent groups, among which the cluster of cultivars from Heilongjiang is distinctly different to the cluster of cultivars from Liaoning. For the examined functional genes, two or three allelic variations for each were detected, except for IPA1 and GW2, and most of elite genes had been introgressed in modern japonica rice varieties. These results provide a valuable evaluation for genetic backgrounds of current japonica rice and will be used directly for japonica rice breeding in future.
关键词	ORYZA-SATIVA L. SSR ALLELIC DIVERSITY POPULATION-STRUCTURE TEMPORAL TRENDS GRAIN-SIZE NATURAL VARIATION MARKERS CULTIVARS MICROSATELLITE GERMPLASM japonica rice cultivars genetic diversity elite gene introgression simple sequence repeat functional gene tags
收录类别	CSCD
语种	英语
资助项目	[National Natural Science Foundation of China] ; [Program for Liaoning Excellent Talents in University (LNET), China]
CSCD记录号	CSCD:5418715
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158076
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.Heilongjiang Acad Agr Science, Mudanjiang Branch, Mudanjiang 157041, Peoples R China
推荐引用方式 GB/T 7714	Liu Dan,Wang Jiayu,Wang Xiaoxue,et al. Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China[J]. JOURNAL OF INTEGRATIVE AGRICULTURE,2015,14(5):811-822.
APA	Liu Dan,Wang Jiayu,Wang Xiaoxue,Yang Xianli,Sun Jian,&Chen Wenfu.(2015).Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China.JOURNAL OF INTEGRATIVE AGRICULTURE,14(5),811-822.
MLA	Liu Dan,et al."Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China".JOURNAL OF INTEGRATIVE AGRICULTURE 14.5(2015):811-822.