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GrainGenes Reference Report: TAG-103-1074

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Reference	TAG-103-1074
Title	QTL analysis of tolerance to a German strain of BYDV-PAV in barley (Hordeum vulgare L.)
Journal	Theoretical and Applied Genetics
Year	2001
Volume	103
Pages	1074-1083
Author	Scheurer KS Friedt W Huth W Waugh R Ordon F
Abstract	Summary: One hundred and forty six barley doubled-haploid lines (DH lines) were tested for variation in grain yield, yield components, plant height, and heading date after artificial infection with a German isolate of barley yellow dwarf virus (BYDV-PAV-Braunschweig). Of these 146 lines 76 were derived from the cross of the barley yellow dwarf virus (BYDV) tolerant cultivar 'Post' to cv 'Vixen' (Ryd2) and 70 from the cross of Post to cv 'Nixe'. Phenotypic measurements were gathered on both non-infected plants and plants artificially inoculated with BYDV-PAV by viruliferous aphids in pot and field experiments for three years at two locations. For all traits a continuous variation was observed suggesting a quantitative mode of inheritance for tolerance against BYDV-PAV. Using skeleton maps constructed using SSRs, AFLPs and RAPDs, two QTLs for relative grain yield per plant after BYDV infection, explaining about 47% of the phenotypic variance, were identified in Post x Vixen at the telomeric region of chromosome 2HL and at a region containing the Ryd2 gene on chromosome 3HL. In Post x Nixe, a QTL was found in exactly the same chromosome 2HL marker interval. In this cross, additional QTL were mapped on chromosomes 7H and 4H and together these explained about 40% of the phenotypic variance. QTL for effects of BYDV infection on yield components, plant height, and heading date generally mapped to the same marker intervals, or in the vicinity of the QTL for relative grain yield, on chromosomes 2HL and 3HL, suggesting that these regions are of special importance for tolerance to the Braunschweig isolate of BYDV-PAV. Possible applications of marker-assisted selection for BYDV tolerance based on these results are discussed
Keyword	[ Hide all but 1 of 65 ] aflp analysis aphid bammv-resistance barley barley yellow dwarf barley yellow dwarf virus barley yellow dwarf virus (bydv-pav) tolerance bydv chromosome continuous variation cross cultivar date dh lines doubled haploid doubled haploid lines dwarf dwarf virus field field experiment gene grain grain yield heading heading date height hordeum hordeum vulgare infection inheritance interval isolate line location loci maize streak virus map marker marker assisted selection mascarene source measurement molecular markers mosaic-virus plant height qtl qtl analysis rapd region resistance genes selection ssr strain tolerance trait variance variation virus vulgare wheat yd2 gene yellow dwarf yellow dwarf virus yield yield components

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