HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (6) Citing Articles via Google Scholar Google Scholar Articles by Dong, Y. Articles by Lin, D. Search for Related Content PubMed Articles by Dong, Y. Articles by Lin, D. Agricola Articles by Dong, Y. Articles by Lin, D. Related Collections Rice Seed Quality Crop Genetics

CELL BIOLOGY & MOLECULAR GENETICS

Mapping of QTL for Embryo Size in Rice

Agricultural Faculty, Miyazaki University, Miyazaki City, 889-2192, Japan

^* Corresponding author (a01120u{at}cc.miyazaki-u.ac.jp)

The development of molecular genetic maps has accelerated the identification and mapping of genomic regions controlling quantitative trait loci (QTL) in rice (Oryza sativa L.). Minimizing embryo size in rice would increase proportion of edible endosperm. This study was conducted to determine the genetic basis controlling embryo size of rice grains in a recombinant inbred (RI) population derived from cross of a japonica cultivar, Asominori, with an indica cultivar, IR24, by means of 289 restriction fragment length polymorphism (RFLP) markers. Two parameters, embryo length and embryo width, which represent embryo size in rice, were estimated for each RI line and their parental varieties. Continuous distributions and transgressive segregations of embryo length and embryo width in rice were observed in the RI population, suggesting that embryo size was quantitative in grains of conventional varieties. Three QTL for embryo length were detected on chromosomes 1, 2, and 3 and explained 17.9, 25.7, and 9.2%, respectively, of the total phenotypic variation. Three QTL for the embryo width were observed on chromosome 2, 8, and 10 and accounted for 13.5, 15.7, and 15.0% of total phenotypic variation, respectively. In addition, alleles with increasing and decreasing effects were detected from the both parents. The results and the tightly linked molecular markers that flank the QTL will be useful in breeding for embryo improvement in rice.

Abbreviations: CIM, composite interval mapping • cM, centimorgan • QTL, quantitative trait locus • RFLP, restriction fragment length polymorphism • RI, recombination inbred

This article has been cited by other articles:

				Z. Hu, X. Wang, and C. Xu A Method for Identification of the Expression Mode and Mapping of QTL Underlying Embryo-Specific Characters J. Hered., September 1, 2006; 97(5): 473 - 482. [Abstract] [Full Text] [PDF]