Abstract Background Common bacterial blight (CBB), incited by Xanthomonas axonopodis pv. phaseoli ( Xap ), is a major yield-limiting factor of common bean Phaseolus vulgaris L.) production around the world. Host resistance practically most effective and environmentally-sound approach to control CBB. Unlike conventional QTL discovery strategies, in which bi-parental populations (F 2 , RIL, or DH) need be developed, association mapping-based strategies can use plant breeding synchronize...

Competition from weeds can reduce grain yields in both conventional and organic systems. Plant height, tillering, elevated photosynthetically active radiation interception are some of the traits thought to help confer competitive ability cereal grains. Crop cultivars developed before advent modern, high-input agriculture may be better suited lower soil nutrient levels weed competition. Twenty-seven spring bread wheat (Triticum aestivum L.) cultivars, representing 114 yr Canadian breeding,...

The major physiological determinants of wheat (Triticum aestivum L.) phenology in a given area are response to vernalization temperature and day length, which at least part, regulated by the allelic variation (VRN) photoperiod (PPD) loci, respectively. Characterization existing genetic for plant winter can assist breeding programs improve adaptation local environments optimize changing climate. objectives this research were characterize VRN PPD loci diverse panel high latitude genotypes (n =...

Vernalization response (Vrn) genes play a major role in determining the flowering/maturity times of spring-sown wheat. We characterized representative set 40 western Canadian adapted spring wheat cultivars/lines for 3 Vrn loci. The genotypes were screened, along with 4 known genes, using previously published genome-specific polymerase chain reaction primers designed detecting presence or absence dominant recessive alleles loci: Vrn-A1, Vrn-B1, and Vrn-D1. promoter duplication allele Vrn-A1a...

Organically managed production systems often experience greater weed pressure than their conventional counterparts, potentially causing yield losses and increased seed build‐up. The use of competitive crop cultivars the cultural practice increasing seeding rates may moderate such constraints. Field trials were conducted at two organically locations in Alberta, Canada for 2 yr to determine effect competition with tame oat ( Avena sativa L.), cultivar, rate (300 600 seeds m −2 ) on ability...

Goyal A., Beres, B. L., Randhawa, H. S., Navabi, Salmon, D. F. and Eudes, 2011. Yield stability analysis of broadly adaptive triticale germplasm in southern central Alberta, Canada for industrial end-use suitability. Can. J. Plant Sci. 91: 125–135. Triticale (×Triticosecale Wittmack) is a cereal crop with high grain yield biomass potential, which are traits desired biorefinery processes that currently utilize wheat (Triticum aestivum). This study was conducted to evaluate the performance...

We recently reported three earliness per se quantitative trait loci (QTL) associated with flowering and maturity in a recombinant inbred lines (RILs) population derived from cross between the spring wheat (Triticum aestivum L.) cultivars 'Cutler' 'AC Barrie' using 488 microsatellite diversity arrays technology (DArT) markers. Here, we present QTLs time, maturity, plant height, grain yield high density single nucleotide polymorphic (SNP) markers same population. A mapping of 158 RILs two...

Common beans (Phaseolus vulgaris) form a relationship with nitrogen-fixing rhizobia and through process termed symbiotic nitrogen fixation (SNF) which provides them source of nitrogen. However, are considered poor fixers, modern production practices involve routine use N fertilizer, leads to the down-regulation SNF. High-yielding, conventionally-bred bean varieties developed using conventional selection criteria, typically not including SNF efficiency, may have lost this trait over decades...

Mechanical, thermal, and water barrier properties of poly(lactic acid) (PLA) film reinforced with cellulose nanofibrils (CNF) bacterial nanocellulose (BNC) were studied compared. The in-situ formation sodium carbonate (Na2CO3) on the BNC surface may aid in reducing interchain hydrogen bonding agglomeration fibers. At optimum loading, both CNF/PLA BNC/PLA nanocomposite films exhibited higher tensile strength Young’s modulus than neat PLA without sacrificing its toughness. displayed lower...

ABSTRACT Characterizing variety testing sites and identification of with negligible genotype × environment crossover interaction is important for plant breeders wishing to identify superior germplasm (or) cultivars a wide range environments. Long‐term multilocation grain yield data from the regional hard red spring wheat ( Triticum aestivum L.) trials 1981 2002 (472 location years assessing 64 genotypes) in Alberta, Canada, were employed this study. The shifted multiplicative model (SHMM)...

An F 4 -derived 6 recombinant inbred line population (n = 148) of a cross between the durable stripe (yellow) rust (caused by Puccinia striiformis) and leaf (brown) triticina) resistant cultivar, Triticum aestivum 'Cook', susceptible genotype Avocet-YrA was phenotyped at several locations in Canada Mexico under artificial epidemics or rusts genotyped using amplified fragment length polymorphism (AFLP) microsatellite markers. Durable adult plant resistance to 'Cook' is inherited...

Abstract Canadian Western Hard Red Spring (CWRS) wheat is recognized as premium quality wheat, ideal for breadmaking due to its superior milling qualities, baking characteristics and protein content. Organic production becoming more prevalent in Canada, increasing consumer demand organic products. Differences may exist the of grown under conventional management, a result dissimilarity between soil crop management practices. Five CWRS cultivars released from 1885 1997 were assessed their...

Abstract High grain yield and protein content, early maturity are important traits in global bread wheat ( Triticum aestivum L.)‐breeding programmes. Improving these three simultaneously is difficult due to the negative association between content positive yield. We investigated genetic relationship maturity, a population of 130 maturing spring lines high latitude (52–53°N) wheat‐growing region Canada. Grain exhibited correlation with (−0.87), fill duration (−0.78), rate (−0.49), (−0.93)...

Recently, we investigated the effect of wheat 90K single nucleotide polymorphic (SNP) array and three gene-specific (Ppd-D1, Vrn-A1 Rht-B1) markers on quantitative trait loci (QTL) detection in a recombinant inbred lines (RILs) population derived from cross between two spring (Triticum aestivum L.) cultivars, 'Attila' 'CDC Go', evaluated for eight agronomic traits at environments under organic management. The objectives present study were to investigate conventional management QTL same...

Farid, M. and Navabi, A. 2015. N 2 fixation ability of different dry bean genotypes. Can. J. Plant Sci. 95: 1243–1257. Common (Phaseolous vulgaris L.) is generally known as a weak fixer compared with other legumes. The availability genetic variation for potential common supports the idea that symbiotic nitrogen (SNF) in can be improved through breeding. To assess selected genotypes, 12 varieties including three Andean nine Middle American were screened SNF related traits controlled...

Our group previously reported five quantitative trait loci (QTL) associated with plant height, test weight, thousand‐kernel and grain protein content in a recombinant inbred line population derived from spring wheat ( Triticum aestivum L.) cultivars ‘Attila’ ‘CDC Go’, evaluated across three environments (2008–2010) under organic management genotyped 579 diversity arrays technology Rht‐B1 markers. No QTL was identified for flowering time, maturity, yield, number of tillers all environments....

We examined the genetic variation for lodging tolerance in different plant height groups, within a diverse population of wheat (Triticum aestivum L.) genotypes (n = 14 0). Lodging was artificially induced by dragging weighted apparatus across plots twice during season at early and late milk stages. Grain yield negatively correlated with lodging, while scores were positively height. Although appeared to be major contributor tolerance, some also observed taller plants. This suggests that gain...

Abstract Plant need‐based N management approaches may increase the efficiency of fertilizer application in wheat ( Triticum aestivum L.) and barley Hordeum vulgare L.). The leaf chlorophyll concentration estimated through SPAD‐502 meter gives a relative assessment status crop. Field trials were conducted near St John's, Newfoundland, between 1997 2000 to describe relationship winter spring grain yield, protein content, yield SPAD measurements, as affected by differential stage crop growth,...

SUMMARY Wheat ( Triticum aestivum L.) variety mixtures represent a relatively unexplored avenue for maintaining and stabilizing yield both organic conventional producers. The present study examined the responses of three Canadian western red spring wheat varieties in sole crop to varying levels simulated natural competition, as well environmental stress at one conventionally two organically managed locations central Alberta, Canada, between 2003 2005. Three modern hard (Superb, semi-dwarf;...