Evaluation of Canadian barley breeding lines for Fusarium head blight resistance

Abstract

Evaluation of Canadian barley breeding lines for Fusarium head blight resistance. Can. J. Plant Sci. 95: 923Á929. Fusarium head blight (FHB) is a major challenge to the successful production of barley in Canada, as well as for end-users such as the malting and brewing industries. Due to the quantitative inheritance of FHB resistance, continuous effort is required to identify breeding lines with improved FHB resistance and incorporate them into crossing schemes to enhance FHB resistance. In the present study, 402 advanced breeding lines from Alberta, Canada, were evaluated in the FHB screening nursery at CIMMYT, Mexico. In 2011 and 2012, FHB incidence was measured on a scale of 1 to 4 to eliminate the most susceptible lines. In 2013 and 2014, 181 lines with the lowest disease scores in the previous 2 yr were tested in replicated experiments for field FHB index, Fusariumdamaged kernels, and deoxynivalenol content. Agronomic and morphological traits, specifically days to heading, plant height, and row and hull types were also evaluated in relations to FHB parameters. Correlation coefficients among the three FHB parameters in both 2013 and 2014 were all significant at PB0.0001, ranging from 0.36 to 0.63. Additional correlation analysis showed that late-maturing, tall, and two-row lines tended to have lower disease, whereas hull type did not show a significant correlation with FHB. Several lines with high and stable FHB resistance similar to that of the resistant checks were identified. These could be used in breeding programs as resistance sources or be registered as new cultivars if their overall attributes meet commercial standards.

Resistance against Fusarium graminearum and the relationship to β-glucan content in barley grains

“…Negative correlations between spike resistance and toxin accumulation have also been reported by other authors (e.g. Tekauz et al 2000;Choo et al 2004;Berger et al 2014;He et al 2015). Yet, the present results show that DON content is not linked with the colonization of the grain by FG.…”

“…Therefore, we expected to observe typical symptoms of F.graminearum on the grains such as the presence of scabby grains, pinkish discolouration, or grain deformation as described by McMullen et al (1997) and He et al (2015). None of these symptoms were found in our samples, besides the presence of black perithecia that we attributed to Fusarium.…”

“…It is conceivable, that the elevated disease pressure and conducive meteorological conditions allowed the development of the typical symptoms on the grains in these studies. Indeed, Berger et al (2014) and He et al (2015) rated pinkish discolouration in grains from intensively irrigated fields and inoculated with a highly aggressive FG isolate.…”

Evaluación de líneas de cebada maltera a fusariosis de la espiga y acumulación de deoxinivalenol

“…(McCallum et al, 2004;Marchand et al, 2008). Seebe 2 Registrada como MR, en ocasiones se comporta como R (Helm et al, 1996;He et al, 2015). Moderadamente resistente (MR) ó moderadamente susceptible (MS) Adabella 6 Variedad MR con tolerancia (Zamora et al, 2008).…”

“…de hileras de grano por espiga Resistencia a la enfermedad Shenmai 1 2 Nombre utilizado en China para referirse a una población segregante de Gobernadora (F4) (Vivar et al, 1997). CDC Copeland 2 Se comporta como MR y MS (He et al, 2015). Xena 2 Se comporta como MR y MS (He et al, 2015).…”