The inheritance of seed dormancy in Sinapis arvensis L.

Garbutt, K.; Witcombe, J. R.

doi:10.1038/hdy.1986.5

Cited by 51 publications

(42 citation statements)

References 23 publications

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“…It shows a pattern of primary dormancy that is lost through afterripening much like B. tectorum (Corbineau et al 1992). Strong genetic control for seed dormancy traits has been demonstrated in many wild species, including annual dicot weeds (e.g., Garbutt and Witcombe 1986 for Sinapis arvensis; Harper and McNaughton 1960; Lane and Lawrence 1995 for species of Papaver) and other sel®ng annual grasses (e.g., Wu et al 1987 for Poa annua). Naylor and Jana (1976) studied population genetics of seed dormancy in the primarily sel®ng annual grass Avena fatua.…”

Section: Discussionmentioning

confidence: 98%

Ecological genetics of seed germination regulation in Bromus tectorum L.

Meyer¹,

Allen

1999

Oecologia

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Regulation of seed germination phenology is an important aspect of the life history strategy of invading annual plant species. In the obligately selfing winter annual grass Bromus tectorum, seeds are at least conditionally dormant at dispersal in early summer and lose dormancy through dry-afterripening. Patterns of germination response at dispersal vary among populations and sometimes across years within populations. To assess the relative contribution of genotype and maturation environment to this variation, we grew progeny of ten parental lines from each of six contrasting populations in a common greenhouse environment. We then tested the germination responses of recently harvested seeds of the putative full-sib progeny at five incubation temperatures. Significant germination response differences among populations were observed in greenhouse cultivation, and major differences among full-sib families were evident for some populations and traits. Among-population variation accounted for over 90% of the variance in each trait, while within-family variance accounted for 1% or less. Germination responses of greenhouse-grown progeny were positively correlated with the responses of wild-collected seeds, but there was a tendency for lowered dormancy at higher incubation temperatures. This tendency was more marked in populations from cold desert, foothill, and plains habitats, suggesting a genotype-maturation environment interaction. Differences among populations in the amount of among-family variance were more evident at lower incubation temperatures, while among-family variance was more uniformly low at summer incubation temperatures. Populations from predictable extreme environments (subalpine meadow and warm desert margin) showed significantly less variation among families than populations from less predictable cold desert, foothill, and plains environments. Low among-family variance was not specifically associated with small population size or marginality of habitat, as small marginal populations from unpredictable environments showed variance as high as that of large populations. In populations with high among-family variance for germination traits, germination responses tended to be correlated across incubation temperatures, making it possible to characterize families in terms of their general dormancy status. The results indicate that seed germination regulation in this species is probably under strong genetic control, and that habitats with temporally varying selection are occupied by populations that tend to be more polymorphic in terms of their germination response patterns.

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Section: Discussionmentioning

confidence: 98%

Ecological genetics of seed germination regulation in Bromus tectorum L.

Meyer¹,

Allen

1999

Oecologia

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“…A strong genetic basis of seed dormancy has been shown for some species (Jana and Naylor, 1980;Garbutt and Witcombe, 1986;Meyer et al, 1995;Meyer and Allen, 1999), but the opposite is true for others (Baskin and Baskin, 1973;Panetta and Randall, 1993;Andersson and Milberg, 1998). Andersson and Milberg (1998) questioned the overriding importance of genetic control in four annual weeds.…”

Section: Discussionmentioning

confidence: 99%

Variation in seed dormancy of the wetland sedge, Carex elongata, between populations and individuals in two consecutive years

Schütz

Rave

2003

Seed Sci. Res.

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Variation in dormancy of the wetland sedge, Carex elongata L., was tested using seeds from three wild populations and the garden-grown progeny of one population. Germination experiments, comprising four combinations of temperature and light, were conducted either with fresh-matured or cold-stratified seeds, to assess the relative contribution of populations and mother plants to the total variation. Between-year variation was tested at the population level and, partly, at the individual level, using seeds collected in two consecutive years. Among-population variation accounted for 72%, and among-individual variation for 23%, of the total variance in the first experiment. Significant differences were apparent between one wild population and its garden-grown descendants. Differences in germinability among populations were maintained in the two consecutive years, but a proportion of the variance was due to the contribution of the maternal environment. Weak evidence for genetic control at the individual level was shown by a correlation across years in one population. However, the lack of a main effect at the individual level in the first experiment makes it difficult to assess the relative contribution of the mother plants to the total variation. Our results imply that germination patterns of C. elongata have a genetic basis, but are markedly modified by environmental conditions.

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“…Genetic studies by Garbutt and Witcombe (1986) on crosses between dormant and non-dormant lines in a population of S. arvensis from the UK indicated both maternal and embryonic components of seed dormancy. The maternal component was controlled by a single locus with two alleles.…”

Section: Reproductionmentioning

confidence: 99%

The biology of Canadian weeds. 8. Sinapis arvensis. L. (updated)

Warwick¹,

Beckie²,

Thomas³

et al. 2000

Can. J. Plant Sci.

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. An updated review of biological information is provided for Sinapis arvensis L. Native to the Old World, the species is widely introduced and naturalized in temperate regions around the world. The species occurs in all the provinces, the Northwest Territories, and the Yukon. It is an important weed of field crops in the Canadian prairies. A strongly persistent seedbank, competitive annual growth habit and high fecundity all contribute to its weedy nature and ensure that it will be a continuing problem. Several cases of herbicide resistance have been documented for natural populations of S. arvensis in Canada, including biotypes resistant to: i) Group 2 herbicides, which inhibit acetolactate synthase (ALS), from Manitoba in 1992 and Alberta in 1993; ii) Group 4 herbicides or synthetic auxins from Manitoba in 1991; and iii) Group 5 herbicides, which inhibit photosynthesis at photosystem II, from Ontario in 1983. The species is a close relative of Brassica nigra (L.) Koch, black mustard, and is capable of limited genetic exchange with the Brassica crop species under laboratory hybridization conditions either by conventional crossing or with the aid of ovary/embryo recovery techniques.

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The inheritance of seed dormancy in Sinapis arvensis L.

Cited by 51 publications

References 23 publications

Ecological genetics of seed germination regulation in Bromus tectorum L.

Ecological genetics of seed germination regulation in Bromus tectorum L.

Variation in seed dormancy of the wetland sedge, Carex elongata, between populations and individuals in two consecutive years

The biology of Canadian weeds. 8. Sinapis arvensis. L. (updated)

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