Journal ArticleDOI
Genetic adaptation for seed dormancy in Avena fatua
J. M. Naylor,S. Jana +1 more
TLDR
Marked differences were found among local populations in germination behavior and the evidence suggests that these differences result in part from genetic adaptation to agronomic practices.Abstract:
Genetic variability affecting duration of primary dormancy is demonstrated in natural populations of wild oats. Marked differences were found among local populations in germination behavior. The evidence suggests that these differences result in part from genetic adaptation to agronomic practices.read more
Citations
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Effect of soil surface topography and litter cover on the germination, survival, and growth of musk thistle (Carduus nutans)
J. L. Hamrick,Janet M. Lee +1 more
TL;DR: Generally, individuals germinating in the early fall had lower mortality, attained larger vegetative sizes and produced more seeds than those that germinated later in the fall or in the spring, consistent with what is known about the germination ecology of musk thistle in natural populations.
Journal ArticleDOI
Genetic and molecular control of seed dormancy
Bailin Li,Michael E. Foley +1 more
TL;DR: The dormancy trait is generally governed by many genes, and in a few cases these genes have been mapped to specific chromosome regions, and some are probably involved in desiccation tolerance and maintaining longevity in dormant seeds.
Journal ArticleDOI
Sibling competition in plants.
TL;DR: Sibling competition can be defined as operating when there is a density- dependent reduction in growth, survival or reproduction in closely interacting siblings utilizing the same space and resources relative to the growth, Survival or reproduction that occurs when siblings are not interacting.
Journal ArticleDOI
Ecological genetics of seed germination regulation in Bromus tectorum L.
Susan E. Meyer,Phil S. Allen +1 more
TL;DR: The results indicate that seed germination regulation in Bromus tectorum 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.
Journal ArticleDOI
Effects of emergence time on survival and growth in an early old-field plant community.
TL;DR: The time at which plants emerge from the soil is shown to be correlated with both survival and growth in each of four years in a plant community emerging after yearly plowing, and there was no correlation between emergence time and species lifespan, growth form, abundance, or competitive ability.
References
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Journal ArticleDOI
Population studies in predominantly self-pollinated species. vi. genetic variability between and within natural populations of wild oats from differing habitats in california
A. G. Imam,R. W. Allard +1 more
TL;DR: The present paper reports an investigation of genetic variability in another predominantly self-pollinated species, wild oats (Auena fatua L.) and provides information of a quantitative nature concerning the mating system of this species.
Journal ArticleDOI
Competition of wild oats (avena fatua l.) in wheat and flax
B. A. Bowden,G. Friesen +1 more
TL;DR: Results of a final series of experiments suggested that the optimum seeding date for flax in Manitoba is the latter part of May or the first week of June, suggesting the general observation that flax is a poor competitor with wild oats.
Journal ArticleDOI
Dormancy studies in seed of avena fatua 4. : the role of gibberellin in embryo dormancy
TL;DR: The levels of free phosphate and specific activity of 3′-nucleotidase, and ability to synthesize soluble protein between 24 and 48 hours, are markedly restricted in highly dormant embryos and GA can overcome these restrictions.
Journal ArticleDOI
Economic losses caused by weed competition in Manitoba grain fields. I. Weed species, their relative abundance and their effect on crop yields.
G. Friesen,L. H. Shebeski +1 more
TL;DR: Economic losses caused by weed competition in Manitoba grain crops were studied on 142 farm fields during a 3-year period, 1956 to 1958 inclusive.