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GrainGenes Reference Report: PBR-123-209

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Reference	PBR-123-209
Title	Genetic analysis of resistance to root-lesion nematode (Pratylenchus thornei) in wheat
Journal	Plant Breeding
Year	2004
Volume	123
Pages	209-212
Author	Zwart RS Thompson JP Godwin ID
Abstract	Summary: 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. Total number of records in report: 152
Keyword	[ Hide all but 1 of 51 ] additive additive gene effects bread bread wheat breeding combining ability combining-ability cross crosses design diallel analysis diallel crosses f-2 population f2 gca gene gene action gene segregation general combining ability genes genetic analysis genetic-analysis hexaploid hexaploid wheat inheritance inheritance (genetics) line lines nematode number performance pest resistance plant parasitic nematodes polygenic inheritance population populations pratylenchus thornei records resistance resistance genes root lesion nematodes root-lesion nematode sca soil specific specific combining ability synthetic hexaploid wheat synthetic populations triticum aestivum wheat wheat breeding

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