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The fruit acidity is a very important characteristic to select promising seedlings in peach breeding programs. Bulked segregant analysis (BSA) with randomly amplified polymorphic DNA (RAPD) analysis was performed to detect markers linked to D gene using F₁ seedlings of low acid ‘Yumyeong’ × low acid ‘Baekhyang’. One RAPD marker coupled to D allele, designated as UBC423₂₁??, was identified from 578 decamer primers examined. In addition, BSA with amplified fragment length polymorphism (AFLP) analysis of this progeny was performed to detect markers tightly linked to D gene. One AFLP marker, EAA/MCAC₃₃?, was identified through the 168 primer combinations tested. The co-segregation of two markers and D/d locus was verified in the 96 individuals of the F₁ progeny of ‘Yumyeong’ × ‘Baekhyang’. The markers UBC4232100 and EAA/MCAC₃₃? were found to be located at 22.1 and 1.1 cM, respectively, on the same side of the D/d locus. The tightly linked marker, EAA/MCAC₃₃?, was attempted to be converted to a sequence characterized amplified region (SCAR) marker. However, this marker could not be converted to SCAR marker. Although polymorphic SCAR could not be developed in the present study, the AFLP marker EAA/MCAC₃₃? could be useful for discriminating seedlings with high fruit acidity from peach seedlings at early developmental stage of the trees.

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Abstract
Introduction
Materials and Methods
Results
Discussion
Literature Cited

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UCI(KEPA) : I410-ECN-0101-2009-525-016909150