An experimental study of intraspecific competition within several forage crops
نویسندگان
چکیده
منابع مشابه
Intraspecific competition reduces niche width in experimental populations
Intraspecific competition is believed to drive niche expansion, because otherwise suboptimal resources can provide a refuge from competition for preferred resources. Competitive niche expansion is well supported by empirical observations, experiments, and theory, and is often invoked to explain phenotypic diversification within populations, some forms of speciation, and adaptive radiation. Howe...
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Theory suggests that frequency-dependent resource competition will disproportionately impact the most common phenotypes in a population. The resulting disruptive selection forms the driving force behind evolutionary models of niche diversification, character release, ecological sexual dimorphism, resource polymorphism, and sympatric speciation. However, there is little empirical support for the...
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MANY papers dealing with the composition and digestibility of forage crops are to be found in the literature, but the analyses are usually restricted to those few groups included in the conventional methods of agricultural analysis. These rarely extend beyond the determination of ash, or mineral constituents, crude protein, crude fibre and ether-soluble material. The sum of these analyses is fa...
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In the improvement of forage crop varieties knowledge of~e .extent of cross-fertilization is of value for (1) de~g the extent and randomness of crossing in breedmg procedures, (2) estimating varietal changes due to contamination and mechanical mixtures, and (3) evaluating effects of cross,fertilization in the development and production of synthetic and hybrid combinations. Genetic markers can a...
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ژورنال
عنوان ژورنال: Agronomie
سال: 1983
ISSN: 0249-5627
DOI: 10.1051/agro:19830508