Clonal reproduction and population genetic structure of grape phylloxera, Daktulosphaira vitifoliae, in Australia

Corrie, A.M., Crozier, R.H., Van Heeswijck, R., and Hoffmann, A.A. (2002) Clonal reproduction and population genetic structure of grape phylloxera, Daktulosphaira vitifoliae, in Australia. Heredity, 88 (3). pp. 203-211.

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Abstract

The grape phylloxera, Daktulosphaira vitifoliae, is a viticultural pest that in the past has devastated vineyards worldwide, yet little is known about this insect's biology. The genetic structure of Australian populations of grape phylloxera and its mode of reproduction were studied following the development of four polymorphic microsatellite loci. Insects were collected from 28 vineyards, with a total of 361 insects included in the study. The majority of vineyards were infested by functionally parthenogenetic lineages of grape phylloxera that inhabit the root system and there was little support for the traditionally described holocyclic life cycle for this species. Clonal diversity was limited in all of the vineyard regions, with the exception of the Rutherglen region. A multiple founder scenario or occasional sex may contribute to diversity within the Rutherglen region. Leaf galling populations comprised classes distinct from the common genotypic classes identified on the roots, suggesting limited exchange between these groups. Implications for the management of D. vitifoliae are discussed.

Item ID: 13532
Item Type: Article (Research - C1)
ISSN: 1365-2540
Keywords: clonal reproduction; Daktulosphaira vitifoliae; microsatellites; parthenogenesis
Date Deposited: 15 Dec 2010 03:21
FoR Codes: 06 BIOLOGICAL SCIENCES > 0699 Other Biological Sciences > 069999 Biological Sciences not elsewhere classified @ 100%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8299 Other Plant Production and Plant Primary Products > 829999 Plant Production and Plant Primary Products not elsewhere classified @ 100%
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