NDLI: Selection of Rqpd Markers for Investigation of Genetic Population Structltre in Fusiform Rust Fungus Infecting Loblolly Pine

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Selection of Rqpd Markers for Investigation of Genetic Population Structltre in Fusiform Rust Fungus Infecting Loblolly Pine

Content Provider	Semantic Scholar
Copyright Year	2005
Abstract	Research to determine patterns of genetic differentiation among and within field populations of Crom.um quercuum f. sp.firsifome using RAPD markers is currently underway in the molecular genetics laboratory at the Southern Institute of Forest Genetics. Fungal tissue was collected as a drop of spermatia or scrapings of a discrete hymenium fiom a single gall on each tree sampled at a location. Collections were made on twenty or more loblolly pines at 25 geographic locations, widely dispersed throughout the natural range of this host species. DNAs are presently bang exmeted fiom these tissue samples. The extracted DNAs are being amplified using the polymerase chain reaction (PCR) and 10-mer oiigonucleotide primers to produce RAPD products that have potential for use as genetic markers. From bulked samples, twenty-one such RAPD markers have been identified that show consistent, clea~ band separations and polymorpbisms that closely correspond to those produced by genetic markers previously shown to segregate as Mendelian factors in a C. q. fiLsiforme population derived from a smgle urediniospore culture. It is likely, however, that some of our extractions contain contaminant DNA, fiom host trees and also possibly fiom insects and other f b g ~ . This extrinsic DNA might be amplified by PCR in addition to the targeted DNA In this paper, we describe techniques that are being employed to provide reasonable assurance that the RAPD markers we use for analysis of allele and haplotype frequencies are C. q. ficsiforme allelic
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://www.srs.fs.usda.gov/pubs/ja/ja_roberds003.pdf
Alternate Webpage(s)	http://www.srs.fs.fed.us/pubs/ja/ja_roberds003.pdf
Alternate Webpage(s)	http://www.srs.fs.usda.gov/pubs/ja/ja_roberds003.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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