Population growth rate of <i>Setaria viridis</i> in the absence of herbicide: resulting yield loss in foxtail millet <i>Setaria italica</i>

Wang, T; Shí, Yùzhēn; Li, Y; Song, Yan-Cun; Darmency, Henri

doi:10.1111/j.1365-3180.2010.00774.x

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…It is a fitness cost similar to that found for atrazine resistance in the same crop (Darmency and Pernès, 1989). We recently reported that trifluralin-and atrazine-resistant lines had similar yields in multisite experiments in China (Wang et al, 2010b), which is consistent with a comparable reproduction cost. In all, 20% is considered to be a significant yield penalty.…”

Section: Discussionsupporting

confidence: 69%

Fitness costs linked to dinitroaniline resistance mutation in Setaria

Darmency¹,

Picard²,

Wang

2011

Heredity

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A mutant Thr-239-Ileu at the a2-tubulin gene was found to confer resistance to dinitroanilines, a family of mitosisdisrupting herbicides. However, mutations affecting microtubule polymerization and cell division are expected to impact growth and reproduction, that is, the fitness of a resistant weed or the yield of a tolerant crop, although it has not been demonstrated yet. This study was designed to test this hypothesis for the growth and reproduction of nearisogenic resistant and susceptible materials that were created in F 2 and F 3 generations after a Setaria viridis x S. italica cross. Differential growth was noticeable at the very onset of seedling growth. The homozygous resistant plants, grown both in a greenhouse cabinet and in the field, were smaller and had lower 1000-grain weight and therefore a lower yield. This fitness penalty is certainly due to modified cell division kinetics. Although the presence of the mutant allele accounted for 20% yield losses, there were also measurable benefits of dinitroaniline resistance, and these benefits are discussed.

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Section: Discussionsupporting

confidence: 69%

Fitness costs linked to dinitroaniline resistance mutation in Setaria

Darmency¹,

Picard²,

Wang

2011

Heredity

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“…Variable results were observed in two other studies, but using non-isogenic materials and without knowledge of the ACCase resistance mechanism (Gill et al, 1996;Recasens et al, 2007). In addition, traits such as seed viability and longevity that were not measured in our experiment but are pertinent to the whole life cycle, have the potential to account for the observed lack of fitness difference between the S and R plants under field plots without (Wang et al, 2010). For instance, the earlier flowering and seed set of R plants could expose R seeds to longer periods of predation than S seeds.…”

Section: Discussionmentioning

confidence: 45%

A herbicide-resistant ACCase 1781 Setaria mutant shows higher fitness than wild type

et al. 2010

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It is often alleged that mutations conferring herbicide resistance have a negative impact on plant fitness. A mutant ACCase1781 allele endowing resistance to the sethoxydim herbicide was introgressed from a resistant green foxtail (Setaria viridis (L.) Beauv) population into foxtail millet (S. italica (L.) Beauv.). (1) Better and earlier growth of resistant plants was observed in a greenhouse cabinet. (2) Resistant plants of the advanced BC7 backcross generation showed more vigorous juvenile growth in the field, earlier flowering, more tillers and higher numbers of grains than susceptible plants did, especially when both genotypes were grown in mixture, but their seeds were lighter than susceptible seeds. (3) Field populations originating from segregating hybrids had the expected allele frequencies under normal growth conditions, but showed a genotype shift toward an excess of homozygous resistant plants within 3 years in stressful conditions. Lower seed size, lower germination rate and perhaps unexplored differences in seed longevity and predation could explain how the resistant plants have the same field fitness over the whole life cycle as the susceptible ones although they produce more seeds. More rapid growth kinetics probably accounted for higher fitness of the resistant plants in adverse conditions. The likelihood of a linkage with a beneficial gene is discussed versus the hypothesis of a pleiotropic effect of the ACCase resistance allele. It is suggested that autogamous species like Setaria could not develop a resistant population without the help of a linkage with a gene producing a higher fitness.

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“…The relationship between weeding interval to Setaria density was exponential and weeding interval to grain yield was polynomial. While, yield increment was directly proportional to time duration period of weed free plots (Wang et al, 2010).…”

Section: Water Use Efficiency and Correlation Matrixmentioning

confidence: 92%

“…Chauhan & Johnson (2010) recorded a grain yield loss of 24% for weed competition of 28 DAS and season long competition forced the maximum yield loss of 89% in rice. The period (07-35 DAS) coincide with tillering and canopy cover, thus maximum number of productive tiller loss is reported during this period that ultimately leads to lower yield (Yaduraju & Mishra, 2004). The relationship between weeding interval to Setaria density was exponential and weeding interval to grain yield was polynomial.…”

Section: Water Use Efficiency and Correlation Matrixmentioning

confidence: 99%

WATER USE EFFICIENCY, GROWTH AND YIELD OF WHEAT CULTIVATED UNDER COMPETITION WITH Setaria

2015

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Understanding the critical period of weed competition is indispensable in the development of an effective weed management program in field crops. Current experiment was planned to evaluate the critical growth period ofSetaria and level of yield losses associated with delay in weeding in rain-fed drip irrigated wheat production system of Saudi Arabia. Field experiment was conducted to evaluate the effect of weeding interval (07-21, 14-28, 21-35, 28-42 and 35-49 days after sowing) and drought stress (75% and 50% of field capacity) on Setaria growth, wheat yield and water use efficiency. Season long weedy check and wellwatered (100% FC) plots were also maintained for comparison. Weeding interval and drought stress significantly (p ≤ 0.05) affected the growth and yield of Setaria and wheat. Drought stress from 75% to 50% FC resulted in reductions of 29-40% in Setaria height, 14-27% in Setaria density and 11-26% in Setaria dry biomass. All weeding intervals except 35-49 DAS significantly suppressedSetaria growth as compared with control. Delay in weeding increased weed-crop competition interval and reduced wheat yield and yield contributors. Therefore, the lowest yield of 1836 kg ha-1 was attained for weeding interval of 35-49 DAS at 50% FC. Water use efficiency and harvest index increased with decreasing FC levels but reduced with delay in weeding. Correlation analysis predicted negative association ofSetariadensity with wheat yield and yield contributors and the highest negative association was for harvest index (-0.913) and water use efficiency (-0.614). Early management of Setaria is imperative for successful wheat production otherwise yield losses are beyond economical limits.

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Population growth rate of Setaria viridis in the absence of herbicide: resulting yield loss in foxtail millet Setaria italica

Cited by 8 publications

References 27 publications

Fitness costs linked to dinitroaniline resistance mutation in Setaria

Fitness costs linked to dinitroaniline resistance mutation in Setaria

A herbicide-resistant ACCase 1781 Setaria mutant shows higher fitness than wild type

WATER USE EFFICIENCY, GROWTH AND YIELD OF WHEAT CULTIVATED UNDER COMPETITION WITH Setaria

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