A genetic analysis of weed competitive ability in spring wheat

Reid, Todd A.; Navabi, Alireza; Cahill, James F.; Salmon, D. F.; Spaner, Dean

doi:10.4141/cjps08105

Cited by 15 publications

(13 citation statements)

References 48 publications

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“…The results of our study are also consistent with those of Donald, in which the yield of cultivars with weak competitive ability in monoculture would be greater than that of others cultivars (Donald and Hamblin 1976;Donald 1981). The results presented here also support the suggestion that the yield potential in modern wheat cultivars is associated with less competitive ability Hamblin 1976, 1983;Fasoula 1990;Reynolds et al 1994;Reid et al 2009). There is evidence that the higher yield of modern cultivars occurs due to reduced yield stability when compared with older cultivars, as well as with improved responsiveness to environmental amelioration, which, in turn, leads to increased inputs of crop management (Calderini and Slafer 1999;Fufa et al 2005;Acreche et al 2008).…”

Section: Discussionsupporting

confidence: 91%

The relationship between competitive ability and yield stability in an old and a modern winter wheat cultivar

Fang

Liu

et al. 2011

Plant Soil

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This study was conducted to determine if there were differences in competitive ability and yield stability on the growth of an old landrace of winter wheat (Triticum aestivum), Pinglang 40 (PL40), and a modern cultivar, Changwu135, (CW135), which differed in time of cultivar release, height, shoot and root biomass. A second aim was to investigate whether there is a relationship between competitive ability and yield stability. One pot and two field experiments were conducted to monitor changes in the competitive ability and yield stability of an old and a modern winter wheat cultivar grown in monoculture and mixtures using a de Wit replacement series. The pot study was conducted at two soil moisture levels: (a) well watered (WW), soil maintained at 85% field capacity, and (b) moderate drought (MD), soil maintained at 55% field capacity. The field experiments were conducted in 2 years that were drier than the average. In the second field experiment 40 mm of irrigation was applied to half of the plots at jointing, booting and anthesis. The results were similar in the pot and field experiments. In the mixture, the old cultivar PL40 had a greater relative yield with a larger number of spikes per plant when compared with those of the modern cultivar CW135. The dry matter per stem of CW135 tended to decrease with the increasing proportion of PL40, indicating a lower competitive ability of the modern cultivar than that of the old cultivar. The superior competition of PL40 was primarily due to the higher plant height, larger leaf area index, greater tillering capacity and larger root system. Our results showed that the modern cultivar CW135 produced a higher grain yield, yield components (except spike number), water use efficiency (WUE g ) and harvest index under both water regimes in monoculture. However, the reduction in grain yield of CW135 when subjected to water-limited conditions was less than that of PL40 in the pot and field experiments. The greater grain yield of the CW135 was associated with a higher harvest index, thousand-kernel-weight and a lower root:shoot ratio. Water consumption over the entire growing period was significantly lower in CW135 under all soil moisture conditions, and the main difference in water consumption between the two cultivars was observed before anthesis. Post-anthesis accumulation of dry matter was greater in CW135 under waterResponsible Editor: Tibor Kalapos.Yan Fang and Lin Liu are equal contributors

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Section: Discussionsupporting

confidence: 91%

The relationship between competitive ability and yield stability in an old and a modern winter wheat cultivar

Fang

Liu

et al. 2011

Plant Soil

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“…High levels of weed pressure, regardless of the management system, resulted in a negative relationship between yield and maturity; whereas moderate to low levels of weed pressure engendered a positive relationship between yield and maturity. Previous reports concluded that earliness confers a competitive advantage to spring wheat in central Alberta (Mason et al 2007c;Reid et al 2009a). In this study, increased weed pressure was apparent in the organic environments, with weeds nearly absent in the conventional environments.…”

Section: Discussioncontrasting

confidence: 41%

Realized gains from selection for spring wheat grain yield are different in conventional and organically managed systems

et al. 2010

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Breeding spring wheat (Triticum aestivum L.) specifically for organic production has been suggested by producers and researchers alike. To investigate the effects of management systems on selected spring wheat breeding line performance in multi-location tests in the northern Great Plains, we used a randomly derived population of 79 F6-derived recombinant inbred lines (RILs) from a cross between the Canadian hard red spring wheat cultivar AC Barrie and the CIMMYT derived cultivar Attila. The population, including the parents, was grown on conventionally and organically managed land in 12 environments over 3 years. Direct selection in each management system (10% selection intensity based on grain yield) resulted in three lines being retained in each management system, over the multi-location testing. Gains from 10% selection for grain yield in a 'selection' year were 3.4 times greater in conventional multi-site yield trials than in organically managed trials. Two lines (BA 05 and BA 36) ranked in the top 10% of both the conventional and organic selection trial of 2005, remained ranked 2nd and 1st, respectively, under conventional management in multi-site yield trials. However, these lines ranked 53rd and 21st, respectively, for grain yield in the multi-site organic yield trials. Selected lines were each yield stable within the management system in which they were selected. Following replicated multilocation yield trials, three lines from the population (BA 02, 29 and 58) ranked within the highest 10% yielding lines in both conventional and organic systems. The results of this study suggest that selection differences occur across multi-location tests, and that selection for grain yield in organic systems should be conducted within organic systems. It is evident, however, that data obtained from conventional yield trials also has some relevance towards breeding for organic environments.

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“…Quantitative trait loci associated with yield and other agronomic traits have been reported on all 21 chromosomes of bread wheat (Huang et al, 2004;Cuthbert et al, 2007;Kumar et al, 2007;Bennett et al, 2012). The University of Alberta wheat breeding program has been evaluating the performance of Canadian wheat cultivars and breeding lines under both conventional and organic management systems in Alberta, Canada (Mason and Spaner, 2006;Mason et al, 2007aMason et al, , 2007bKaut et al, 2008Kaut et al, , 2009Reid et al, 2009aReid et al, , 2009bReid et al, , 2011Kubota et al, 2015). The University of Alberta wheat breeding program has been evaluating the performance of Canadian wheat cultivars and breeding lines under both conventional and organic management systems in Alberta, Canada (Mason and Spaner, 2006;Mason et al, 2007aMason et al, , 2007bKaut et al, 2008Kaut et al, , 2009Reid et al, 2009aReid et al, , 2009bReid et al, , 2011Kubota et al, 2015).…”

mentioning

confidence: 99%

“…The number of QTLs and the proportion of phenotypic variance explained by each QTL are highly variable, depending on the type of population, population size, the number of environments, and the management conditions. The University of Alberta wheat breeding program has been evaluating the performance of Canadian wheat cultivars and breeding lines under both conventional and organic management systems in Alberta, Canada (Mason and Spaner, 2006;Mason et al, 2007aMason et al, , 2007bKaut et al, 2008Kaut et al, , 2009Reid et al, 2009aReid et al, , 2009bReid et al, , 2011Kubota et al, 2015). As part of this work, a recombinant inbred line (RIL) population developed from a cross between spring wheat cultivars 'Attila' (CM85836-50Y-0M-0Y-3M-0Y) and 'CDC Go' was evaluated during 2008 to 2010 under both conventionally and organically managed field conditions and genotyped with 579 diversity arrays technology (DArT) and Rht-B1 markers (Asif et al, 2015).…”

mentioning

confidence: 99%

Mapping QTLs Controlling Agronomic Traits in the ‘Attila’ × ‘CDC Go’ Spring Wheat Population under Organic Management using 90K SNP Array

et al. 2017

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Our group previously reported five quantitative trait loci (QTL) associated with plant height, test weight, thousand‐kernel weight, and grain protein content in a recombinant inbred line population derived from spring wheat (Triticum aestivum L.) cultivars ‘Attila’ and ‘CDC Go’, evaluated across three environments (2008–2010) under organic management and genotyped with 579 diversity arrays technology and Rht‐B1 markers. No QTL was identified for flowering time, maturity, grain yield, and number of tillers across all three environments. In the present study, we reanalyzed the same phenotypic data with a subset of 1200 informative single‐nucleotide polymorphic (SNP) markers out of the 90K SNP array and three gene‐specific markers (Ppd‐D1, Vrn‐A1, and Rht‐B1) to investigate if high marker density improves QTL detection. Here, five moderate‐ and eleven minor‐effect QTLs were detected across all three organic environments using the new genotypic data, including 13 QTLs that were not previously detected. Up to five QTLs were detected for each trait, except grain protein content, which individually accounted for 5.5 to 18.8% of phenotypic variance. For each trait, the total phenotypic and genetic variance explained by all detected QTLs varied from 9.3 to 39.4 and from 24.6 to 96.8%, respectively, which was much greater than in our previous study. One of the moderate‐effect QTLs on 5A was coincidental for flowering time and maturity and mapped close to the Vrn‐A1 gene, while the second moderate‐effect coincidental QTL on 4B was associated with both plant height and maturity but was 27 cM from the Rht‐B1 gene. Results from this study provide additional information for wheat researchers and organic wheat breeders.

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A genetic analysis of weed competitive ability in spring wheat

Cited by 15 publications

References 48 publications

The relationship between competitive ability and yield stability in an old and a modern winter wheat cultivar

The relationship between competitive ability and yield stability in an old and a modern winter wheat cultivar

Realized gains from selection for spring wheat grain yield are different in conventional and organically managed systems

Mapping QTLs Controlling Agronomic Traits in the ‘Attila’ × ‘CDC Go’ Spring Wheat Population under Organic Management using 90K SNP Array

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