QTL Analysis of Resistance to Bacterial Spot Race T3 in Tomato

ACTA HORTICULTURAE SINICA ›› 2011, Vol. 38 ›› Issue (12): 2297-2308.

• Vegetables • Previous Articles Next Articles

QTL Analysis of Resistance to Bacterial Spot Race T3 in Tomato

SUN Hui-jun1，ZHANG Jie-yun1，WANG Yuan-yuan1，SCOTT Jay W.2，FRANCIS David M.3，and YANG Wen-cai1,*

（1Department of Vegetable Science，College of Agriculture and Biotechnology，China Agricultural University，Beijing 100193，China；2Department of Horticultural Sciences，University of Florida，FL 32611，USA；3Department of Horticulture and Crop Science，The Ohio State University，OH 44691，USA）

Received:2011-09-21 Revised:2011-11-18 Online:2011-12-25 Published:2011-12-25
Contact: YANG Wen-cai

Abstract

Abstract: The objective of this study was to understand genetics of resistance and identify molecular markers tightly linked to the resistance to race T3 using an inbred-backcross population derived from the resistant line PI114490. A core set of 516 SSR，SNP，and InDel markers was screened for polymorphisms among the parents of the IBC population，and 72 polymorphic markers were identified. Single marker-trait analysis suggested that the resistance to race T3 in PI114490 was mediated by multiple QTLs on chromosomes 1，3，8 and 11. One QTL on chromosome 11 could contribute 56.5% of phenotypic variation. Genotypic analysis of inbred-backcross lines suggested that interactions among QTLs might exist. These results provide some fundamental information for understanding the mechanism of resistance to race T3 in PI114490 and breeding for resistance.

Key words: tomato, inbred-backcross population, bacterial spot, T3 resistance, QTL

CLC Number:

SUN Hui-jun;ZHANG Jie-yun;WANG Yuan-yuan;SCOTT Jay W.;FRANCIS David M.;and YANG Wen-cai;. QTL Analysis of Resistance to Bacterial Spot Race T3 in Tomato[J]. ACTA HORTICULTURAE SINICA, 2011, 38(12): 2297-2308.

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QTL Analysis of Resistance to Bacterial Spot Race T3 in Tomato

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