Abstract
A bacterial artificial chromosome (BAC) library consisting of 235,000 clones with an average insert size of 130 kb was constructed from Capsicum annuum, 'CM334'. Based on a pepper haploid genome size of 2,702 Mbp/C, the BAC library is estimated to contain approximately 12 genome equivalents and represents at least 99% of the pepper genome. Screening of the library with mitochondrial DNA probes (coxII, coxIII, atp6 and atp9) and chloroplast DNA probes (atpB, rbcL) indicated that contamination with cytoplasmic DNA was less than 0.5%. To estimate the possibility of isolating a specific clone, the library was screened with single or low-copy gene-specific probes and RFLP probes. Screening of high density BAC filters with RFLP markers linked to L (TMV resistance), y (fruit color), C2 (fruit color) and C (pungency) loci under high stringency conditions revealed that at least three positive BAC clones were found per each probe. This fact indicates that the library is highly reliable and represents a resource for map-based cloning, physical mapping, and characterization of upstream and downstream regulations of the chili pepper genes.
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Acknowledgements
This work was supported in part by a grant from Korea Science and Engineering Foundation (KOSEF) to the Center for Plant Molecular Genetics and Breeding Research (CPMGBR). The authors thank Molly Jahn and Steve Tanksley for generously providing the E35/M48-101 AFLP marker and the TG205 RFLP marker. We also thank Doil Choi for providing the CDI136 marker and Kyungsuk So for technical assistance.
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Communicated by J. Dvorak
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Yoo, E.Y., Kim, S., Kim, Y.H. et al. Construction of a deep coverage BAC library from Capsicum annuum, 'CM334'. Theor Appl Genet 107, 540–543 (2003). https://doi.org/10.1007/s00122-003-1279-z
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DOI: https://doi.org/10.1007/s00122-003-1279-z