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Identification of quantitative trait loci for rice grain quality and yield-related traits in two closely related Oryza sativa L. subsp. japonica cultivars grown near the northernmost limit for rice paddy cultivation



Identification of quantitative trait loci for rice grain quality and yield-related traits in two closely related Oryza sativa L. subsp. japonica cultivars grown near the northernmost limit for rice paddy cultivation



Breeding Science 67(3): 191-206



Quantitative trait loci (QTLs) associated with eating quality, grain appearance quality and yield-related traits were mapped in recombinant inbred lines (RILs) derived from closely related rice (Oryza sativa L. subsp. japonica) cultivars, Yukihikari (good eating quality) and Joiku462 (superior eating quality and high grain appearance quality). Apparent amylose content (AAC), protein content (PC), brown grain length (BGL), brown grain width (BGWI), brown grain thickness (BGT), brown grain weight per plant (BGW) and nine yield-related traits were evaluated in 133 RILs grown in four different environments in Hokkaido, near the northernmost limit for rice paddy cultivation. Using 178 molecular markers, a total of 72 QTLs were detected, including three for AAC, eight for PC, two for BGL, four for BGWI, seven for BGT, and six for BGW, on chromosomes 1, 2, 3, 4, 6, 7, 8, 9, 11 and 12. Fifteen intervals were found to harbor multiple QTLs affecting these different traits, with most of these QTL clusters located on chromosomes 4, 6, 8, 9 and 12. These QTL findings should facilitate gene isolation and breeding application for improvement of eating quality, grain appearance quality and yield of rice cultivars.

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Accession: 059825255

Download citation: RISBibTeXText

PMID: 28744172

DOI: 10.1270/jsbbs.16155


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