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We isolated the barley stem rust resistance genes Rpg5 and rpg4 by map-based cloning. These genes are colocalized on a 70-kb genomic region that was delimited by recombination. The Rpg5 gene consists of an unusual structure encoding three typical plant disease resistance protein domains: nucleotide-binding site, leucine-rich repeat, and serine threonine(More)
The physiological basis of genetic variation in drought response and its association with yield and related indices is not clear in tall fescue. In this study thirty genotypes of tall fescue (Festuca arundinacea Schreb.) were sampled from a polycross population and evaluated under two levels of irrigation in 2010 (normal and intense stress) and 2011 (normal(More)
The stem rust resistance gene Rpg1 has protected North American barley cultivars from significant yield losses for over 65 years. The remarkable durability of this gene warrants further study as to its possible origin and allelic variation. Eight Swiss barley (Hordeum vulgare) landraces and eight wild barley (H. vulgare subsp. spontaneum) accessions from(More)
Metallothioneins (MTs) are ubiquitous, low molecular mass and cysteine-rich proteins that play important roles in maintaining intracellular metal homeostasis, eliminating metal toxification and protecting the cells against oxidative damages. MTs are able to bind metal ions through the thiol groups of their cysteine residues. Plants have several MT isoforms(More)
Endophytic fungi are a group of fungi that live asymptomatically inside plant tissue. These fungi may increase host plant tolerance to biotic and abiotic stresses. The effect of Neotyphodium endophytes in two grass species (Festuca arundinacea and Festuca pratensis) on cadmium (Cd) tolerance, accumulation and translocation has been our main objective. The(More)
Host specificity of Neotyphodium species symbiotic with three grass species, Festuca arundinacea, Festuca pratensis and Lolium perenne, was studied based on comparisons of amplified fragment length polymorphisms (AFLP) between hosts and their corresponding endophytes. Endophytic fungi were isolated from 24 accessions of host plants. Neotyphodium identity(More)
Despite efforts made, forage yield of smooth bromegrass has increased slowly over the last 50 years of breeding. It therefore seems necessary to investigate more on the genetic basis of agro-morphological traits in this cool-season, highly drought resistant grass. The present study was aimed at estimation of total genetic variance, narrow-sense(More)
Metallothioneins (MTs) are a superfamily of low-molecular-weight, cysteine (Cys)-rich proteins that are believed to play important roles in protection against metal toxicity and oxidative stress. Plants have several MT isoforms, which are classified into four types based on the arrangement of Cys residues. In this study, two rice (Oryza sativa) MT isoforms,(More)
Evaluation of yield performance and its stability is essential for yield trials conducted in different environments. We determined the forage yield stability of 24 tall fescue (Festuca arundinacea Schreb.) genotypes using different parametric and non-parametric stability measures and compared those stability statistics across 14 test environments(More)
In forage grasses, knowledge about genetic analysis of seed production and its association with related traits under water deficit condition is very limited. Half sib families derived from polycross of 25 Orchardgrass genotypes were evaluated under normal and drought stress environments in the field during 2012 and 2013. Results showed that drought stress(More)