Genetic Variation of Allozyme and Quantitative Traits in a Selected Douglas-fir [Pseudotsuga Menziesii Var. Menziesii (Mirb.) Franco] Population PDF Download
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Author: Y. A. El-Kassaby
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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![Genetic Variation of Allozyme and Quantitative Traits in a Selected Douglas-fir [Pseudotsuga Menziesii Var. Menziesii (Mirb.) Franco] Population PDF](https://books.google.com/books/content/images/frontcover/3GbONwAACAAJ?fife=w80-h100)
Author: Y. A. El-Kassaby
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Author: David B. Neale
Publisher: Springer
ISBN: 3319468073
Category : Science
Languages : en
Pages : 590
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This book is the first comprehensive volume on conifers detailing their genomes, variations, and evolution. The book begins with general information about conifers such as taxonomy, geography, reproduction, life history, and social and economic importance. Then topics discussed include the full genome sequence, complex traits, phenotypic and genetic variations, landscape genomics, and forest health and conservation. This book also synthesizes the research included to provide a bigger picture and suggest an evolutionary trajectory. As a large plant family, conifers are an important part of economic botany. The group includes the pines, spruces, firs, larches, yews, junipers, cedars, cypresses, and sequoias. Of the phylum Coniferophyta, conifers typically bear cones and evergreen leaves. Recently, there has been much data available in conifer genomics with the publication of several crop and non-crop genome sequences. In addition to their economic importance, conifers are an important habitat for humans and animals, especially in developing parts of the world. The application of genomics for improving the productivity of conifer crops holds great promise to help provide resources for the most needy in the world.
Author: W.T. Adams
Publisher: Springer Science & Business Media
ISBN: 9401128154
Category : Science
Languages : en
Pages : 423
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Tropical climates, which occur between 23°30'N and S latitude (Jacob 1988), encompass a wide variety of plant communities (Hartshorn 1983, 1988), many of which are diverse in their woody floras. Within this geographic region, temperature and the amount and seasonality of rainfall define habitat types (UNESCO 1978). The F AO has estimated that there 1 are about 19 million km of potentially forested area in the global tropics, of which 58% were estimated to still be in closed forest in the mid-1970s (Sommers 1976; UNESCO 1978). Of this potentially forested region, 42% is categorized as dry forest lifezone, 33% is tropical moist forest, and 25% is wet or rain forest (Lugo 1988). The species diversity of these tropical habitats is very high. Raven (1976, in Mooney 1988) estimated that 65% of the 250,000 or more plant species of the earth are found in tropical regions. Of this floristic assemblage, a large fraction are woody species. In the well-collected tropical moist forest of Barro Colorado Island, Panama, 39. 7% (481 of 1212 species) of the native phanerogams are woody, arborescent species (Croat 1978). Another 21. 9% are woody vines and lianas. Southeast Asian Dipterocarp forests may contain 120-200 species of trees per hectare (Whitmore 1984), and recent surveys in upper Amazonia re corded from 89 to 283 woody species ~ 10 cm dbh per hectare (Gentry 1988). Tropical communities thus represent a global woody flora of significant scope.
Author: Douglas E. Soltis
Publisher: Springer Science & Business Media
ISBN: 9400918402
Category : Science
Languages : en
Pages : 273
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Author: Thomas B. Smith
Publisher: Oxford University Press
ISBN: 0195344669
Category : Science
Languages : en
Pages : 498
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Molecular techniques are proving invaluable in determining the phylogenetic status of potentially endangered species, for investigating mechanisms of speciation, and for measuring the genetic structure of populations. It is increasingly important for ecologists and evolutionary and conservation biologists to understand and use such molecular techniques, but most workers in these areas have not been trained in molecular biology. This book lays out the principles and basic techniques for the molecular tools appropriate for addressing issues in conservation, and it presents case studies showing how these tools have been used successfully in conservation biology. Examples include the genetic analysis of population structure, various uses of DNA in conservation genetics, and estimation of migration parameters from genetic data. Wildlife managers, as well as researchers in these areas, will find this a valuable book.
Author: Richard G. Lawford
Publisher: Springer Science & Business Media
ISBN: 1461239702
Category : Science
Languages : en
Pages : 430
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Book Description
Regional intercomparisons between ecosystems on different continents can be a powerful tool to better understand the ways in which ecosystems respond to global change. Large areas are often needed to characterize the causal mechanisms governing interactions between ecozones and their environments. Factors such as weather and climate patterns, land-ocean and land-atmosphere interactions all play important roles. As a result of the strong physical north-south symmetry between the western coasts of North and South America, the similarities in climate, coastal oceanography and physiography between these two regions have been extensively documented. High Latitude Rain Forests and Associated Ecosystems of the West Coast of the Americas presents current research on West Coast forest and river ecology, and compares ecosystems of the Pacific Northwest with those of South America.
Author:
Publisher:
ISBN:
Category : Forest genetics
Languages : en
Pages : 722
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Author:
Publisher:
ISBN:
Category : Forest genetics
Languages : en
Pages : 864
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Author: Vernon J. LaBau
Publisher: Society of American Foresters.
ISBN:
Category : Nature
Languages : en
Pages : 312
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Author: Yi Long
Publisher:
ISBN:
Category : Douglas fir
Languages : en
Pages : 212
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One hundred and four seed sources from throughout the range of Douglas-fir (Pseudotecia menzieaii (Plirb.) Franco) were analysed at 20 enzyme loci to determine patterns of genetic variation and to examine intraspecific phylogeny. On average the seed sources were polymorphic at 37 percent of the loci (range 5.0-65.0), with mean expected heterozygosity equal to .141 (range .021-.243). Of the total genie diversity (H1 = .182) observed in the species. about 75 percent resided within seed sources; 12 percent was due to dfferences among the two recognized varieties. coastal (var. menziesii) and interior (var. plauca,) Douglas-fir; and, 13 percent was distributed among seed sources within varieties respectively. Cluster analysis based on Nei's unbiased genetic distances resulted in two groups of seed sources corresponding to the two varieties with the interior variety additionally separated into northern and southern subgroups near 440 latitude. A major transition zone between the two varieties was found in central Oregon but not in other regions as revealed in earlier investigations. On averages seed sources within the coastal variety and northern interior subgroup had higher levels of expected heterozygosity but genetic differentiation among seed sources was small. Levels of expected heterozygosity were much smaller in the southern interior subgroups but seed sources were highly differentiated. Genetic variation was clinally patterned in the interior variety but no obvious geographical patterns were found in the coastal variety. In general genetic diversity decreased towards the periphery of the species range. Range-wide patterns of variation based on allozymes were quite similar to those observed in terpene studies of Douglas-fir. A major exception was that seed sources from the Sierra Nevada Mountains of California had a high affinity with the coastal variety as revealed in this study but appeared to more closely aligned to the interior variety in a terpene study. On the broad scales range-wide patterns of genetic variation in Douglas-fir agreed well with paleobotanical history for Douglas-fir; divisions and migrations associated with clmatic and geologic changes were reflected in allozyme patterns.
