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GrainGenes Reference Report: CPS-84-935

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Reference	CPS-84-935
Title	Identification of a quantitatively inherited source of Hordeum bulbosum derived scald resistance from barley line 926K2/11/1/5/1.
Journal	Canadian Journal of Plant Science
Year	2004
Volume	84
Pages	935-938
Author	Singh AK Rossnagel BG Scoles GJ Pickering RA
Abstract	Scald resistance breeding requires identification and incorporation of novel resistance sources into local breeding populations. A New Zealand barley ( Hordeum vulgare ) line (926K2/11/1/5/1) was evaluated in scald ( Rhynchosporium secalis ) nurseries at Lacombe and Edmonton, Alberta, Canada, as a potential source of scald resistance derived from H. bulbosum . Primary objectives were to evaluate the level of resistance in 926K2/11/1/5/1 under Canadian conditions and determine its mode of inheritance. In western Canadian nurseries, 926K2/11/1/5/1 exhibited moderate resistance. 926K2/11/1/5/1 was crossed with the scald-susceptible cultivar CDC McGwire and resulting progeny (F SUB 2 and F SUB 4:5 recombinant inbred lines) were tested for normality of disease reaction distribution, and were used to estimate the number of effective factors controlling the resistance. F SUB 1 plants expressed an intermediate scald reaction compared with the parents. F SUB 2 and F SUB 4:5 data were normally distributed. Estimation of the number of effective factors using the Castle-Wright formula indicated that resistance from 926K2/11/1/5/1 is quantitatively inherited, but controlled by relatively few genes. The moderate scald resistance in 926K2/11/1/5/1 is an additional resistance source plant breeders can utilize
Keyword	[ Hide all but 1 of 11 ] agriculture barley disease resistance fungal diseases inbred line inheritance plant diseases plant pathogenic fungi plant pathogens progeny resistance

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