TY - JOUR
T1 - Quantitative trait loci for whiteness of cooked rice detected in improved rice cultivars in Hokkaido
AU - Shinada, Hiroshi
AU - Yamamoto, Toshio
AU - Yamamoto, Eiji
AU - Hori, Kiyosumi
AU - Hirayama, Yuji
AU - Maekawa, Toshihiko
AU - Kiuchi, Hitoshi
AU - Sato, Hirokazu
AU - Sato, Takashi
N1 - Publisher Copyright:
© 2015, Japanese Society of Breeding. All rights reserved.
PY - 2015
Y1 - 2015
N2 - Improving the eating quality of cooked rice has been one of the most important objectives in rice breeding programs. Eating quality of cooked rice is a complex trait including several components, such as external appearance, taste, aroma, and texture. Therefore, dissection of these components followed by marker-assisted selection of detected QTL(s) may be a useful approach for achieving desirable eating quality in rice breeding. Whiteness of cooked rice (WCR) is an important factor related to the external appearance of cooked rice. WCR is known to be associated with the amylose and protein contents of the endosperm. However, the genetic basis of WCR remains unclear. In this study, we evaluated phenotypic variation in WCR among recently developed rice cultivars from Hokkaido, Japan. Then, we developed doubled haploid lines (DHLs) derived from a cross between two cultivars from Hokkaido, Joiku No. 462 (high WCR) and Jokei06214 (low WCR). Using the DHLs, we detected two QTLs for WCR, qWCR3 and qWCR11, on chromosomes 3 and 11, respectively. We also examined the dosage effect of the two QTLs based on both the categorized segregants in the DHLs and the relationship between the WCR phenotype and inheritance around the QTL regions in cultivars from Hokkaido.
AB - Improving the eating quality of cooked rice has been one of the most important objectives in rice breeding programs. Eating quality of cooked rice is a complex trait including several components, such as external appearance, taste, aroma, and texture. Therefore, dissection of these components followed by marker-assisted selection of detected QTL(s) may be a useful approach for achieving desirable eating quality in rice breeding. Whiteness of cooked rice (WCR) is an important factor related to the external appearance of cooked rice. WCR is known to be associated with the amylose and protein contents of the endosperm. However, the genetic basis of WCR remains unclear. In this study, we evaluated phenotypic variation in WCR among recently developed rice cultivars from Hokkaido, Japan. Then, we developed doubled haploid lines (DHLs) derived from a cross between two cultivars from Hokkaido, Joiku No. 462 (high WCR) and Jokei06214 (low WCR). Using the DHLs, we detected two QTLs for WCR, qWCR3 and qWCR11, on chromosomes 3 and 11, respectively. We also examined the dosage effect of the two QTLs based on both the categorized segregants in the DHLs and the relationship between the WCR phenotype and inheritance around the QTL regions in cultivars from Hokkaido.
KW - Eating quality
KW - Oryza sativa L
KW - Rice breeding programs
KW - Whiteness of cooked rice
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U2 - 10.1270/jsbbs.65.201
DO - 10.1270/jsbbs.65.201
M3 - Article
AN - SCOPUS:84937852096
SN - 1344-7610
VL - 65
SP - 201
EP - 207
JO - Breeding Science
JF - Breeding Science
IS - 3
ER -