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Genetic analysis of resistance to root-lesion nematode (Pratylenchus thornei) in wheat

Zwart, R.S. and Thompson, J.P. and Godwin, I.D. (2004) Genetic analysis of resistance to root-lesion nematode (Pratylenchus thornei) in wheat. Plant Breeding, 123 (3). pp. 209-212.

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Article Link(s): http://dx.doi.org/10.1111/j.1439-0523.2004.00986.x

Publisher URL: http://www.blackwell-synergy.com

Abstract

The inheritance of resistance to root-lesion nematode was investigated in five synthetic hexaploid wheat lines and two bread wheat lines using a half-diallel design of F1 and F2 crosses. The combining ability of resistance genes in the synthetic hexaploid wheat lines was compared with the performance of the bread wheat line 'GS50a', the source of resistance to Pratylenchus thornei used in Australian wheat breeding programmes. Replicated glasshouse trials identified P. thornei resistance as polygenic and additive in gene action. General combining ability (GCA) of the parents was more important than specific combining ability (SCA) effects in the inheritance of P. thornei resistance in both F1 and F2 populations. The synthetic hexaploid wheat line 'CPI133872' was identified as the best general combiner, however, all five synthetic hexaploid wheat lines possessed better GCA than 'GS50a'. The synthetic hexaploid wheat lines contain novel sources of P. thornei resistance that will provide alternative and more effective sources of resistance to be utilized in wheat breeding programmes

Item Type:Article
Business groups:Agri-Science, Crop and Food Science
Additional Information:© Blackwell Publishing Ltd.
Keywords:Triticum aestivum; Pratylenchus thornei; combining ability; diallel crosses; root lesion nematode; synthetic hexaploid wheat.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Plant pests and diseases > Individual or types of plants or trees > Wheat
Science > Biology > Genetics
Deposited On:09 Aug 2004
Last Modified:26 Oct 2011 05:25

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