Chinese Journal OF Rice Science >
Genome-wide Association Analysis of Rice Heading Date and Yield-related Traits Based on MAGIC Population
#These authors contributed equally to the work
Received date: 2020-01-19
Revised date: 2020-03-04
Online published: 2020-07-10
【Objective】The objective of the study is to identify new genes related to heading date and yield related traits in rice, and to screen the elite rice lines carrying favorable alleles, therefore providing new genes and excellent germplasm for molecular marker-assisted (MAS) breeding.【Method】The multi-parent generation inter-crosses (MAGIC) population MAGIC-Hei was planted in 2017 and 2018 in Changsha, Hunan Province. Genome-wide association analysis was performed to detect the quantitative trait loci associated with heading date, number of tillers per plant, grain number per panicle, seed setting rate, 1000-grain weight and grain yield per plant based on genotyping by sequencing (GBS).【Results】Totally, 26 QTLs that control heading date and yield related traits were identified on all the chromosomes except chromosome 10 in the two years. Of these, 11 are new and qNTP9, associated with the number of effective panicles, was detected in the two years. qNTP9 was less affected by environment and could be used for further fine mapping and gene cloning. Based on the phenotypic and the SNP genotypes five elite lines carrying favorable alleles were selected, which could be used for future high-yielding rice breeding. 【Conclusion】The loci associated with heading date and yield related traits could be used for rice breeding.
Xiucai WEI, Jindong LIU, Licheng LIU, Yongchao LI, Xiaowu PAN, Zheng DONG, Wenqiang LIU, Haibo XIONG, Jun MIN, Xiaoxiang LI . Genome-wide Association Analysis of Rice Heading Date and Yield-related Traits Based on MAGIC Population[J]. Chinese Journal OF Rice Science, 2020 , 34(4) : 325 -331 . DOI: 10.16819/j.1001-7216.2020.0107
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