1. Geographical patterns of genetic variation in the world collections of wild annualCicercharacterized by amplified fragment length polymorphisms.
- Author
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Shan, F., Clarke, HC., Plummer, JA., Yan, G., and Siddique, KHM.
- Subjects
CICER ,LEGUMES ,CHICKPEA ,GENETIC polymorphisms ,CULTIVARS - Abstract
Cicer reticulatum,C. echinospermum,C. bijugum,C. judaicum,C. pinnatifidum,C. cuneatumandC. yamashitaeare wild annualCicerspecies and potential donors of valuable traits to improve chickpea (C. arietinum). As part of a large project to characterize and evaluate wild annualCicercollections held in the world gene banks, AFLP markers were used to study genetic variation in these species. The main aim of this study was to characterize geographical patterns of genetic variation in wild annualCicergermplasm. Phylogenetic analysis of 146 wild annualCiceraccessions (including two accessions in the perennialC. anatolicumand six cultivars of chickpea) revealed four distinct groups corresponding well to primary, secondary and tertiary gene pools of chickpea. Some possible misidentified or mislabelled accessions were identified, and ILWC 242 is proposed as a hybrid betweenC. reticulatumandC. echinospermum. The extent of genetic diversity varied considerably and was unbalanced between species with greatest genetic diversity found inC. judaicum. For the first time geographic patterns of genetic variation inC. reticulatum,C. echinospermum,C. bijugum,C. judaicumandC. pinnatifidumwere established using AFLP markers. Based on the current collections the maximum genetic diversity ofC. reticulatum,C. echinospermum,C. bijugumandC. pinnatifidumwas found in southeastern Turkey, while Palestine was the centre of maximum genetic variation forC. judaicum. This information provides a solid basis for the design of future collections and in situ conservation programs for wild annualCicer. [ABSTRACT FROM AUTHOR]
- Published
- 2005
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