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Isolation of a major genetic interaction associated with an extreme phenotype using assorted F2 populations in rice

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Title: Isolation of a major genetic interaction associated with an extreme phenotype using assorted F2 populations in rice
Authors: Ota, Yuya Browse this author
Ishiguro, Seiya Browse this author
Aoyama, Eiko Browse this author
Aiba, Ryosuke Browse this author
Iwashiro, Reika Browse this author
Tanabata, Takanari Browse this author
Takamure, Itsuro Browse this author
Fujino, Kaien Browse this author
Kishima, Yuji Browse this author
Keywords: Assorted F2 populations
Extreme phenotype
Heading date
Issue Date: Apr-2014
Publisher: Springer
Journal Title: Molecular Breeding
Volume: 33
Issue: 4
Start Page: 997
End Page: 1003
Publisher DOI: 10.1007/s11032-013-9998-6
Abstract: Detection of quantitative trait loci (QTLs) is dependent on the materials used in the analysis, as different combinations of parental materials may lead to different outcomes in QTLs for the same trait. On the other hand, an extreme phenotype associated with a given trait implies the potential involvement of a particular allele in various allelic interactions. A genetic factor associated with such an extreme phenotype may frequently be identified from various genetic populations consisting of different parental combinations. In this study, we attempted to uncover the genetic factor associated with extremely early heading date in rice, using various F2 populations. Heading date in rice has been characterized by at least 19 QTLs, from which 12 genes have been identified. A58, a rice strain with an extremely early heading date, is adapted to Hokkaido, the northernmost limit of rice cultivation. Six F2 populations derived from crosses of A58 with six other strains displayed a range of heading dates. Genotyping using 19 QTL markers indicated that the A58 allele of the Ghd7 locus was present in most F2 individuals exhibiting extremely early heading dates. This analysis also demonstrated that when the wild-type Ehd1 allele was present, the Ghd7 allele from A58 accelerated floral induction. The results of this study demonstrate that assorted F2 populations are valuable materials for comprehensive genotyping to explore major genetic factors for extreme phenotypes, and that this methodology is broadly applicable to other unknown traits.
Rights: The final publication is available at Springer via
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 貴島 祐治

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