help button home button Genetics Mol Cellular Biology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Genetics, Vol. 168, 2187-2195, December 2004, Copyright © 2004
doi:10.1534/genetics.104.034165

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Li, J.
Right arrow Articles by McCouch, S. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Li, J.
Right arrow Articles by McCouch, S. R.

Fine Mapping of a Grain-Weight Quantitative Trait Locus in the Pericentromeric Region of Rice Chromosome 3

Jiming Li, Michael Thomson1 and Susan R. McCouch2

Department of Plant Breeding, Cornell University, Ithaca, New York 14853

2 Corresponding author: Department of Plant Breeding and Genetics, 162 Emerson Hall, Cornell University, Ithaca, NY 14853.
E-mail: srm4{at}cornell.edu

As the basis for fine mapping of a grain-weight QTL, gw3.1, a set of near isogenic lines (NILs), was developed from an Oryza sativa, cv. Jefferson x O. rufipogon (IRGC105491) population based on five generations of backcrossing and seven generations of selfing. Despite the use of an interspecific cross for mapping and the pericentromeric location of the QTL, we observed no suppression of recombination and have been able to narrow down the location of the gene underlying this QTL to a 93.8-kb region. The locus was associated with transgressive variation for grain size and grain weight in this population and features prominently in many other inter- and intraspecific crosses of rice. The phenotype was difficult to evaluate due to the large amount of variance in size and weight among grains on a panicle and between grains on primary and secondary panicles, underscoring the value of using multiple approaches to phenotyping, including extreme sampling and NIL group-mean comparisons. The fact that a QTL for kernel size has also been identified in a homeologous region of maize chromosome 1 suggests that this locus, in which the dominant O. rufipogon allele confers small seed size, may be associated with domestication in cereals.




This article has been cited by other articles:


Home page
 Crop Sci.Home page
K. K. Jena and D. J. Mackill
Molecular Markers and Their Use in Marker-Assisted Selection in Rice
Crop Sci., July 1, 2008; 48(4): 1266 - 1276.
[Abstract] [Full Text] [PDF]

Home page
 Crop Sci.Home page
Y.-G. Cho, H.-J. Kang, J.-S. Lee, Y.-T. Lee, S.-J. Lim, H. Gauch, M.-Y. Eun, and S. R. McCouch
Identification of Quantitative Trait Loci in Rice for Yield, Yield Components, and Agronomic Traits across Years and Locations
Crop Sci., November 7, 2007; 47(6): 2403 - 2417.
[Abstract] [Full Text] [PDF]

Home page
 Genome Res.Home page
G. He, X. Luo, F. Tian, K. Li, Z. Zhu, W. Su, X. Qian, Y. Fu, X. Wang, C. Sun, et al.
Haplotype variation in structure and expression of a gene cluster associated with a quantitative trait locus for improved yield in rice
Genome Res., May 1, 2006; 16(5): 618 - 626.
[Abstract] [Full Text] [PDF]

Home page
 GeneticsHome page
M. C. Hall, C. J. Basten, and J. H. Willis
Pleiotropic Quantitative Trait Loci Contribute to Population Divergence in Traits Associated With Life-History Variation in Mimulus guttatus
Genetics, March 1, 2006; 172(3): 1829 - 1844.
[Abstract] [Full Text] [PDF]

Home page
 GeneticsHome page
A. You, X. Lu, H. Jin, X. Ren, K. Liu, G. Yang, H. Yang, L. Zhu, and G. He
Identification of Quantitative Trait Loci Across Recombinant Inbred Lines and Testcross Populations for Traits of Agronomic Importance in Rice
Genetics, February 1, 2006; 172(2): 1287 - 1300.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2004 by the Genetics Society of America.