Abstract:
:Tomato bacterial wilt (BW) incited by Ralstonia solanacearum is a constraint on tomato production in tropical, subtropical and humid regions of the world. In this paper, we present the results of a research aimed at the identification of PCR-based markers amplified fragment length polymorphism (AFLP) linked to the genes that confer resistance to tomato BW. To this purpose, bulked segregant analysis was applied to an F(2) population segregating for the BW resistant gene and derived from the pair-cross between a BW resistant cultivar T51A and the susceptible cultivar T9230. Genetic analysis indicated that tomato BW was conferred by two incomplete dominant genes. A CTAB method for total DNA extraction, developed by Murray and Thompson with some modifications was used to isolation the infected tomato leaves. Thirteen differential fragments were detected using 256 primer combinations, and two AFLP markers were linked to the BW resistance. Subsequently, the AFLP markers were converted to co-dominant SCAR markers, named TSCAR(AAT/CGA) and TSCAR(AAG/CAT). Linkage analysis showed that the two markers are on the contralateral side of TRSR-1. Genetic distance between TSCAR(AAT/CGA) and TRS-1 was estimated to 4.6 cM, while 8.4 cM between TSCAR(AAG/CAT) and TRS-1.
journal_name
Mol Biol Repjournal_title
Molecular biology reportsauthors
Miao L,Shou S,Cai J,Jiang F,Zhu Z,Li Hdoi
10.1007/s11033-007-9204-1subject
Has Abstractpub_date
2009-03-01 00:00:00pages
479-86issue
3eissn
0301-4851issn
1573-4978journal_volume
36pub_type
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