Results 191 to 200 of about 10,901,941 (264)

PLANT POPULATION BIOLOGY AT THE CROSSROADS

Evolution, 1978
from 1968 to 1972, this volume is a goldmine of information concerning the biological interactions of acridid grasshoppers, especially those of economic importance. If Uvarov had lived longer, I suspect that a third volume would have been necessary, since the present one at 613 pages is 200 longer than the first volume (still in print), which includes ...
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Coadaptation in Plant Populations

1977
One of the most important questions of plant breeding is whether alleles at different loci act independently or whether the population genotype is structured so that favored combinations of alleles occur more frequently than expected under randomness. Studies employing allozyme loci as markers have demonstrated that the distribution of alleles in both ...
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History of Plant Population Genetics

Annual Review of Genetics, 1999
▪ Abstract  This review of plant population genetics focuses on the genetic foundations of the processes that have led to documentable improvements in cultivated plants since the earliest domestications took place perhaps 13,000 years ago. Nearly all human civilizations have depended heavily on inbreeding plants (particularly wheat, barley, soybeans ...
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Palaeoecology and plant population dynamics

Trends in Ecology & Evolution, 1988
The pollen record of the past 10-20 thousand years is a source of data both on long-term climatic change and on the dynamics of plant populations in response to climatic change. Time sequences of pollen accumulation rates record invasions of tree taxa over 10(1)-10(3) years.
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Group selection in plant populations

Theoretical and Applied Genetics, 1987
Several mechanisms have been proposed for group selection, to account for the evolution of altruistic traits. One type, Neighbourhood models, suggests that individuals react with those immediately around them, but with no recognition mechanism. The organization of plant populations seems especially favorable for this type of selection.
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Asymmetric competition in plant populations

Trends in Ecology & Evolution, 1990
Recently there has been much interest in the hypothesis that competition between individual plants is asymmetric or onesided: larger individuals obtain a disproportionate share of the resources (for their relative size) and suppress the growth of smaller individuals.
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Pachyderms, primates, plants and population

Reproduction, Fertility and Development, 2002
In the past, growth in human population has often been associated with species loss. Current rates of population growth, both globally (1 million more births than deaths every 103 hours) and regionally, pose a threat of additional ecological damage.
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Corn Planting Date and Plant Population

Journal of Production Agriculture, 1994
Predictions of yield responses to planting date and plant population in corn (Zea mays L.) are necessary in order to match plant population to a particular planting date, and also to make replant decisions. Much of the published research on these factors is relatively old.
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Plant Growth and Population Dynamics

The main purpose of quantitative nematological research is twofold. First, to develop mathematical models that contribute to theory building. Second, for farmers, to achieve optimal financial returns of crops in the presence of plant-parasitic nematodes.
Schomaker, Corrie H., Been, Thomas H., Teklu, Misghina G.   +2 more
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Plant Population Ecology

1994
In Central Europe plant population ecology as a relatively young science is receiving more and more interest among ecologists. The recently published book on population ecology by Schmid and Stocklin (1991) and the textbook of Urbanska (1992), both in German, illustrate this.
Walter Seidling, Uwe Starfinger, Jürg Stöcklin   +2 more
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