Abstract:
:European hazelnut (Corylus avellana L.) is the only economically important nut crop in the family Betulaceae. Because of its small genome size (~385 Mb / 1C), relatively short life cycle, availability of a dense linkage map, and amenability to transformation by Agrobacterium, the European hazelnut could serve as a model plant for the Betulaceae. Here we report the construction of a bacterial artificial chromosome (BAC) library for 'Jefferson' hazelnut using the cloning enzyme MboI and the vector pECBAC1 (BamHI site). The library consists of 39,936 clones arrayed in 104,384-well microtitre plates with a mean insert size of 117 kb. The genomic coverage of the library is estimated to be about 12 genome equivalents. This library provides a valuable resource for the map-based cloning of two important genes, the resistance gene from 'Gasaway' that confers resistance to eastern filbert blight caused by the fungus Anisogramma anomala (Peck) E. Müller and the S locus that controls pollen-stigma incompatibility. Fine-resolution mapping near the two loci was carried out using random amplified polymorphic DNA (RAPD) and simple sequence repeat (SSR) markers. Fine mapping at the disease resistance locus showed that markers W07-375 and X01-825 flanked the resistance locus at distances of 0.06 and 0.05 cM, respectively. The S locus is flanked by markers 204-950 and KG819-200 at distances of 0.14 and 0.24 cM, respectively. Assuming that 1 cM corresponds to a physical distance of 430 kb, it will take approximately two to three chromosome walks to assemble BAC contigs that span both loci.
journal_name
Genomejournal_title
Genomeauthors
Sathuvalli VR,Mehlenbacher SAdoi
10.1139/g11-048subject
Has Abstractpub_date
2011-10-01 00:00:00pages
862-7issue
10eissn
0831-2796issn
1480-3321journal_volume
54pub_type
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