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Author : Janet R. Dugle
Publisher :
ISBN 13 :
Total Pages : 77 pages
Book Rating : 4.:/5 (421 download)
Download or read book A Taxonomic Study of Western Canadian Species in the Genus Betula written by Janet R. Dugle and published by . This book was released on 1966 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Janet Rogge Dugle
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (142 download)
Download or read book A Taxonomic Study of Western Canadian Species in the Genus Betula written by Janet Rogge Dugle and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five western North American birches, Betula fontinalis . B. glandulosa , B. pumila var. glandulifera , B. resinifera and B. papyrifera are studied taxonomically. Synonymy, descriptions, distribution and representative specimens examined are included. Four hybrid taxa, B. x winteri , B. x sargentii , B. x arbuscula, and B. x uliginosa , are described for the first time and three additional hybrids, B>. x utahensis , B. x eastwoodae and B. x sandbergii are also included. When birch species are in contact, they often hybridize. The populations so formed have been analyzed and the nature of several hybrid entities determined. The methods of analysis applied are as follows: chromatography of leaves and bark; hybrid index; polygonal graphs; chromosome numbers; pollen size, morphology and stainability; stomatal size; germination data; and pictorialized scatter diagrams. Betula x uliginosa (2n = 28-56) is the result of hybridization between B. resinifera and B. pumila var. glandulifera . In the population analyzed, introgression was in the direction of B. pumila var. glandulifera , the birch with the higher chromosome number. When B. pumila var. glandulifera is in contact with B. glandulosa , B. x sargentii (2n = 28-56) is produced. Introgression seems to be in both directions, although most of the gene flow is in the direction of the taxon with the higher chromosome number, B. pumila var. glandulifera . B. x eastwoodae (2n = 28) is the result of hybridization between B. glandulosa and B. fontinalis . Introgression was influenced very little by environmental selection, and B. x eastwoodae seemed to be as common as either of the parental species; and any gene flow was in either direction. B. x utahensis (2n = 28-84 with a concentration at 2n = 56) is the result of hybridization between B. papyrifera and B. fontinalis . In populations of these birches, introgression is mainly from B. fontinalis into B. papyrifera . Hybridization of B. x sargentii and B. papyrifera results in B. x arbuscula (2n = 28-84), a rare hybrid. Tentative conclusions are that introgression is in the direction of B. papyrifera , the taxon with the higher chromosome number. Hybridization of B, resinifera and B. papyrifera produces B. x winteri (2n = 28-84 with a concentration of individuals at 2n = 56). In the populations of these birches which were analyzed, introgression was in both directions. B. x sandbergii (2n = 56-84) results from hybridization of B. papyrifera and B. pumila var. glandulifera . As contrasted with the above, and probably as a result of strong environmental influence in the area in which this cross was analyzed, introgression was in the direction of J3. pumila var. glandulifera , the parental taxon with the lower chromosome number.
Author :
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ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.3/5 (91 download)
Download or read book General Technical Report INT written by and published by . This book was released on 1992 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bruce Paul Dancik
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.3/5 (91 download)
Download or read book A Population Study of the Birches, Betula Alleghaniensis, B. Pumila, and Their Hybrid written by Bruce Paul Dancik and published by . This book was released on 1967 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (89 download)
Download or read book Idaho's Rare Vascular Flora written by and published by . This book was released on 1992 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert K. Moseley
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (319 download)
Download or read book Idaho's Rare Vascular Flora written by Robert K. Moseley and published by . This book was released on 1992 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (319 download)
Download or read book Dynamics of Forest Herbivory written by and published by . This book was released on 1996 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Philip Stewart
Publisher : CRC Press
ISBN 13 : 1926692985
Total Pages : 342 pages
Book Rating : 4.9/5 (266 download)
Download or read book Vascular Plants and Paleobotany written by Philip Stewart and published by CRC Press. This book was released on 2011-12-15 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an important collection of new research that sheds light on many aspects of the evolutionary patterns of gymnosperms, angiosperms, and pteridophtes. The book includes a complete chloroplast genome sequence study and describes a method that induces the systemic silencing of target genes in the Ceratopteris gametophyte. It presents a study of how herbicide treatments reduce fern densities and create the establishment of regeneration. It also analyzes an EST dataset from G. biloba that reveals genes potentially unique to gymnosperms and includes a study of episodic rate acceleration in the ancestral grasses.
Author : Hans Arne Jensen
Publisher : CRC Press
ISBN 13 : 9789054104506
Total Pages : 324 pages
Book Rating : 4.1/5 (45 download)
Download or read book Bibliography on Seed Morphology written by Hans Arne Jensen and published by CRC Press. This book was released on 1998-06-01 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seeds are a vital part of life on earth. They are fundamental for plant reproduction, and many seeds play an important role in the diet of man and domestic and wild animals. Knowledge of the appearance of seeds - seed morphology - is of great importance to botany and seed identification in relation to: seed setting, quarantine work, forensic work, seed poisening, studies of seed dispersal, seed banks and archaeological studies.;This bibliography contains 3775 references and is divided in two parts: handbooks, and articles and monographs. In the latter the bibliographical reference is supplemented by information of importance to seed identificaiton: genera mentioned in articles, keys, descriptions, drawings, photograph, scanning electron micrographs, anatomy and chemical methods. The index of authors contains the names of an extensive number of authors, cited in the bibliography, and in the index of genera more than 3900 genera, described in one or more of the publications are cited.
Author : Theodosius Dobzhansky
Publisher : Springer Science & Business Media
ISBN 13 : 1468480944
Total Pages : 459 pages
Book Rating : 4.4/5 (684 download)
Download or read book Evolutionary Biology written by Theodosius Dobzhansky and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1 On Some Fundamental Concepts of Darwinian Biology.- Vitalism, Mechanism, and Compositionism.- Adaptedness and Adaptation.- Adaptedness to Survive and to Reproduce.- Adaptability.- Evolutionary Plasticity.- The Problem of Quantification of Adaptedness.- Darwinian Fitness.- Varieties of Natural Selection.- Darwinian Fitness and Adaptedness.- Evolutionary Opportunism and Adaptive Radiation.- Progressive Evolution.- References.- 2 Cave Ecology and the Evolution of Troglobites.- Animal Life in Caves.- The Cave Ecosystem.- Regressive Evolution in Cave Animals.- Speciation and Adaptation in Troglob.
Author : Gerald B. Ownbey
Publisher : U of Minnesota Press
ISBN 13 : 1452902062
Total Pages : 322 pages
Book Rating : 4.4/5 (529 download)
Download or read book Vascular Plants of Minnesota written by Gerald B. Ownbey and published by U of Minnesota Press. This book was released on 1991 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 375 pages
Book Rating : 4.:/5 (31 download)
Download or read book Agriculture Handbook written by and published by . This book was released on 1979 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 340 pages
Book Rating : 4.3/5 (91 download)
Download or read book General Technical Report NC. written by and published by . This book was released on 1981 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Elbert Luther Little
Publisher :
ISBN 13 :
Total Pages : 62 pages
Book Rating : 4.3/5 (129 download)
Download or read book Trees and Shrubs of the United States written by Elbert Luther Little and published by . This book was released on 1976 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected references have been compiled for identification of the United States of wild and cultivated trees, shrubs, and woody vines, together known as woody vines. This bibliography of more than 470 titles lists general references as well as those of special geographic regions, all 50 States, Puerto Rico, the Virgin Islands, and Guam. The period covered is the interval from 1950 to 1975, but many older publications are cited. Special lists include bibliographies, check lists, atlases, references for genera and families, cultivated woody plants, identification in winter, and seeds and seedlings. There is an index to authors.
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ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.3/5 (91 download)
Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Les Viereck
Publisher : University of Alaska Press
ISBN 13 : 160223132X
Total Pages : 388 pages
Book Rating : 4.6/5 (22 download)
Download or read book Alaska Trees and Shrubs written by Les Viereck and published by University of Alaska Press. This book was released on 2010-11-15 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Alaska Trees and Shrubs has been the definitive work on the woody plants of Alaska for more than three decades. This new, completely revised second edition provides updated information on habitat, as well as detailed descriptions of every tree or shrub species in the state. New distribution maps reflect the latest survey data, while the keys, glossary, and appendix on non-native plants make this the most useful guide to Alaska trees and shrubs ever published.
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ISBN 13 :
Total Pages : 922 pages
Book Rating : 4.X/5 (4 download)
Download or read book Proceedings written by and published by . This book was released on 1985 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
