Analysis of Rice Grain Quality-Associated Quantitative Trait Loci by Using Genetic Mapping

HTML  Download Download as PDF (Size: 2061KB)  PP. 1125-1132  
DOI: 10.4236/ajps.2014.59125    4,905 Downloads   8,090 Views  Citations

ABSTRACT


The main objective of this research was to identify quantitative trait loci associated with rice qualities to provide reliable information for marker-assisted selection and development of new varieties. In total, 120 doubled haploid (DH) lines developed by another culture from the F1 hybrid of a cross between “Cheongcheong”, a Tongil variety, and “Nagdong”, a japonica variety, were used. A microsatellite linkage map of 222 markers spanned 2082.4 centimorgans (cM) and covered 12 rice chromosomes with an average interval of 9.4cM between markers. Eight quantitative trait loci (QTLs) were associated with rice quality, consisting of two QTLs on chromosomes 1 and 9 for amylose content; three QTLs on chromosomes 8, 9, and 10 for protein content; and three QTLs on chromosomes 2, 3, and 6 for lipid content. PCR expression levels measured using the SSR markers RM23914 for proteins and RM6266 for lipids, and RM586 showed a higher degree of amplification. The present study should be useful for improving the nutritional quality of rice by means of marker-assisted selection.


Share and Cite:

Yun, B. , Kim, M. , Handoyo, T. and Kim, K. (2014) Analysis of Rice Grain Quality-Associated Quantitative Trait Loci by Using Genetic Mapping. American Journal of Plant Sciences, 5, 1125-1132. doi: 10.4236/ajps.2014.59125.

Copyright © 2024 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.