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 Related articles in Crop Science Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Frei, A. Articles by Dorn, S. Search for Related Content PubMed Articles by Frei, A. Articles by Dorn, S. Agricola Articles by Frei, A. Articles by Dorn, S. Related Collections Insect Resistance Other Legumes

GENOMICS, MOLECULAR GENETICS & BIOTECHNOLOGY

QTL Mapping of Resistance to Thrips palmi Karny in Common Bean

^a Centro Internacional de Agricultura Tropical, CIAT, AA 6713, Cali, Colombia
^b Institute of Plant Sciences/Applied Entomology, Swiss Federal Institute of Technology (ETH), CH-8092, Zurich, Switzerland

^* Corresponding author (m.blair{at}cgiar.org)

Host plant resistance in common bean (Phaseolus vulgaris L.) is a promising component in an integrated cropping system for managing thrips (Thrips palmi Karny) infestation. This study was conducted to identify quantitative trait loci (QTLs) for resistance to thrips in common bean, using F_5:7 recombinant inbred lines (RILs) as a mapping population. The RILs, derived by single seed descent (SSD) of the cross of two Mesoamerican bean lines, BAT 881 and G 21212, were found to show transgressive segregation for thrips resistance in the field. Correlations between damage and reproductive adaptation (RA) scores were significant within and between seasons. The QTLs for both traits were located based on single interval mapping (IM) and joint interval mapping (JIM) analysis using a genetic map constructed with microsatellite and random amplified polymorphic DNA (RAPD) markers. Eight of eleven resulting linkage groups (LGs) were shown to be homologous to chromosomes of the integrated linkage map of common bean. A major QTL for thrips resistance located on LG b06 explained up to 26.8% of variance for resistance in a single season and was named Tpr6.1. The JIM across several seasons revealed various QTLs on LGs b02, b03, b06, and b08, some of which were located at regions of genes encoding for disease resistance. The identification and mapping of thrips-resistance genes is expected to facilitate the development of resistant bean cultivars by using molecular marker-assisted selection.

Abbreviations: BCMV, Bean common mosaic virus • IM, interval mapping • JIM, joint interval mapping • LG, linkage group • LR, likelihood ratio • PCR, polymerase chain reaction • QTL, quantitative trait locus • RA, reproductive adaptation • RAPD, random amplified polymorphic DNA • RIL, recombinant inbred line • SSD, single seed descent

Related articles in Crop Science:

THIS ISSUE IN CROP SCIENCE

Crop Science 2005 45: xi. [Full Text]  

This article has been cited by other articles:

				J. J. Maxwell, M. A. Brick, P. F. Byrne, H. F. Schwartz, X. Shan, J. B. Ogg, and R. A. Hensen Quantitative Trait Loci Linked to White Mold Resistance in Common Bean Crop Sci., November 7, 2007; 47(6): 2285 - 2294. [Abstract] [Full Text] [PDF]