Inheritance of resistance to flax wilt (Fusarium oxysporum f.sp. lini Schlecht) in a doubled haploid population of Linum usitatissimum L. |
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| Authors: | W Spielmeyer ES Lagudah N Mendham AG Green |
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| Institution: | (1) CSIRO Plant Industry, P.O. Box 1600, Canberra, ACT, 2601, Australia;(2) Department of Agricultural Science, University of Tasmania, GPO Box 252-54, Hobart, 7000, Australia |
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| Abstract: | The inheritance of resistance to fusarium wilt (Fusarium oxysporum f.sp. lini) was investigated in Linum usitatissimum as
a first step towards gaining an understanding of the molecular genetics of the disease and developing a procedure for marker-assisted
selection. A recombinant doubled haploid (DH) population was derived from the haploid component of polyembryonic F2 seeds originating from a cross between a wilt resistant, twinning Linola™ Linola is a registered trademark of CSIRO line
CRZY8/RA91 and the wilt susceptible Australian flax cultivar Glenelg. The segregation of resistance was studied in 143 DH
lines under glasshouse and field conditions. Most of the phenotypic variation was attributable to the segregation of two independent
genes with additive effects. Minor resistance genes may have also contributed by modifying the resistance response. A glasshouse
screening method of DH lines proved a reliable indicator of field resistance to fusarium wilt.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | doubled haploids Fusarium oxysporum fusarium wilt Linum usitatissimum resistance |
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