GrainGenes Reference Report: TAG-106-550
Reference
TAG-106-550
Title
Temporal flux in the morphological and molecular diversity of UK barley
Journal
Theoretical and Applied Genetics
Year
2003
Volume
106
Pages
550-558
Author
Koebner RMD Donini P Reeves JC Cooke RJ Law JR
Abstract
Summary: Genetic-diversity assessments, using both phenotypic and molecular-marker data, were made on a collection of 134 barley varieties (both winter and spring types), chosen on the basis of their representation on the NIAB 'Recommended List' over the period 1925-1995. Genotypic (AFLP and SSR) and phenotypic (UPOV characters) data were analysed to determine short- and long-term temporal trends in diversity over the period. A consistent pattern emerged demonstrating that only a minor proportion of the overall variance appears to be the result of any temporal drift, although there were strong indications of qualitative shifts in diversity, probably related to the changing relative acreage of winter and spring barleys over the study period. Our overall conclusions are that systematic plant breeding does not inevitably lead to a reduction in the genetic diversity of agricultural crops, and that diverse breeding programmes and the variety delivery systems in place in the UK have generally been successful in maintaining sufficient genetic diversity to allow the steady rise in genetic potential that has been a feature of 20th century crop breeding. The concentration of breeding effort into a smaller number of independent programmes is likely to be prejudicial to the maintenance of the genetic diversity of a crop
External Databases
Pubmed: 12589556
Keyword
aflp
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: TAG-106-550
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||