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DNA Research Advance Access published online on April 9, 2009
DNA Research, doi:10.1093/dnares/dsp006
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© The Author 2009. Kazusa DNA Research Institute
The online version of this article has been published under an open access model. Users are entitled to use, reproduce, disseminate, or display the open access version of this article for non-commercial purposes provided that: the original authorship is properly and fully attributed; the Journal and Oxford University Press are attributed as the original place of publication with the correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated. For commercial re-use, please contact journals.permissions@oxfordjournals.org

Towards the Understanding of Complex Traits in Rice: Substantially or Superficially?

Toshio Yamamoto, Junichi Yonemaru and Masahiro Yano*

QTL Genomics Research Center, National Institute of Agrobiological Science, Kannondai 2-1-2, Tsukuba, Ibaraki 305-8602, Japan

Received 4 February 2009 ; accepted 17 March 2009.

Completion of the genome analysis followed by extensive comprehensive studies on a variety of genes and gene families of rice (Oryza sativa) resulted in rapid accumulation of information concerning the presence of many complex traits that are governed by a number of genes of distinct functions in this most important crop cultivated worldwide. The genetic and molecular biological dissection of many important rice phenotypes has contributed to our understanding of the complex nature of the genetic control with respect to these phenotypes. However, in spite of the considerable advances made in the field, details of genetic control remain largely unsolved, thereby hampering our exploitation of this useful information in the breeding of new rice cultivars. To further strengthen the field application of the genome science data of rice obtained so far, we need to develop more powerful genomics-assisted methods for rice breeding based on information derived from various quantitative trait loci (QTL) and related analyses. In this review, we describe recent progresses and outcomes in rice QTL analyses, problems associated with the application of the technology to rice breeding and their implications for the genetic study of other crops along with future perspectives of the relevant fields.

Key words: QTL; near-isogenic lines; chromosome segment substitution lines; marker-assisted selection; map-based cloning

* To whom correspondence should be addressed. Tel. +81 298-38-7135. Fax. +81 298-38-7135. E-mail: myano{at}affrc.go.jp

Edited by Katsumi Isono.


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