期刊
SOIL SCIENCE AND PLANT NUTRITION
卷 64, 期 3, 页码 278-281出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00380768.2017.1412238
关键词
Akamai; Oryza sativa; phosphorus; quantitative trait loci; QTL-Seq
资金
- Ministry of Agriculture, Forestry and Fisheries (MAFF), Japan through a research project entitled 'Genomics-based Technology for Agricultural Improvement [LCT-0006]
- Grants-in-Aid for Scientific Research [15H04465, 15H04466, 16K18667, 17H03783] Funding Source: KAKEN
Phosphorus (P) is a major nutrient supporting rice productivity. Improving low-P tolerance of rice is expected to reduce dependence on P fertilizer, thereby reducing rice production costs and environmental impacts. This report describes the mapping of quantitative trait loci (QTL) associated with P deficiency tolerance in japonica rice. An F5 population derived from a cross of the low-P tolerant cultivar Akamai (Yamagata) and the sensitive cultivar Koshihikari was evaluated for shoot growth under low-P conditions. Then single nucleotide polymorphism (SNP) profiles of the low-P tolerant and sensitive bulks were compared on a genome-wide scale by QTL-Seq, a rapid QTL mapping method using next-generation sequencing technology. Results show a major QTL associated with low-P tolerance located on the long arm of chromosome 12. It has been named QTL for low-P tolerance 1 or qLPT1. SNPs were detected in 45 genes of qLPT1 region and the 5 genes were harboring synonymous SNPs, although none of them had been reported as involved in low-P tolerance. This result implies that the novel gene responsible for low-P tolerance exists in qLPT1. This study will contribute to the elucidation of mechanisms underlying low-P tolerance of Akamai and will facilitate the breeding of rice with low-P tolerance.
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