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Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China
Alternative TitleGenetic diversity and elite gene introgression reveal the japonica rice breeding in northern China
Liu Dan1; Wang Jiayu1; Wang Xiaoxue1; Yang Xianli1; Sun Jian1; Chen Wenfu1
2015
Source PublicationJOURNAL OF INTEGRATIVE AGRICULTURE
ISSN2095-3119
Volume14Issue:5Pages:811-822
AbstractAbundant 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.
Other AbstractAbundant 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.
KeywordORYZA-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
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Program for Liaoning Excellent Talents in University (LNET), China]
CSCD IDCSCD:5418715
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158076
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.Heilongjiang Acad Agr Science, Mudanjiang Branch, Mudanjiang 157041, Peoples R China
Recommended Citation
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.
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