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Identification of quantitative trait loci contributing to Fusarium wilt resistance on an AFLP linkage map of flax (Linum usitatissimum)


Spielmeyer, W and Green, AG and Bittisnich, D and Mendham, NJ and Lagudah, ES, Identification of quantitative trait loci contributing to Fusarium wilt resistance on an AFLP linkage map of flax (Linum usitatissimum), Theoretical and Applied Genetics, 97, (4) pp. 633-641. ISSN 0040-5752 (1998) [Refereed Article]

DOI: doi:10.1007/s001220050939


An AFLP genetic linkage map of flax (Linum usitatissimum) was used to identify two quantitative trait loci (QTLs) on independent linkage groups with a major effect on resistance to Fusarium wilt, a serious disease caused by the soil pathogen Fusarium oxysporum (lini). The linkage map was constructed using a mapping population from doubled-haploid (DH) lines. The DH lines were derived from the haploid component of F 2 haploid-diploid twin seed originating from a cross between a polyembryonic, low-linolenic-acid genotype (CRZY8/RA91) and the Australian cultivar 'Glenelg'. The AFLP technique was employed to generate 213 marker loci covering approximately 1400 cM of the flax genome (n = 15) with an average spacing of 10 cM and comprising 18 linkage groups. Sixty AFLP markers (28%) deviated significantly (P < 0.05) from the expected segregation ratio. The map incorporated RFLP markers tightly linked to flax rust (Melamspora lini) resistance genes and markers detected by disease resistance gene-like sequences. The study illustrates the potential of the AFLP technique as a robust and rapid method to generate moderately saturated linkage maps, thereby allowing the molecular analysis of traits, such as resistance to Fusarium wilt, that show oligogenic patterns of inheritance.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture improvement (incl. selection and breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Linseed
UTAS Author:Spielmeyer, W (Mr Wolfgang Spielmeyer)
UTAS Author:Mendham, NJ (Dr Neville Mendham)
ID Code:14557
Year Published:1998
Web of Science® Times Cited:49
Deposited By:Agricultural Science
Deposited On:1998-08-01
Last Modified:2011-08-09

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