A Population Study Of The Birches Betula Alleghaniensis B Pumila And Their Hybrid

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A Population Study Of The Birches Betula Alleghaniensis B Pumila And Their Hybrid

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Author : Bruce Paul Dancik
language : en
Publisher:
Release Date : 1967

A Population Study Of The Birches Betula Alleghaniensis B Pumila And Their Hybrid written by Bruce Paul Dancik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Hybridization categories.

Proceedings Northeastern Forest Tree Improvement Conference

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Author :
language : en
Publisher:
Release Date : 1968

Proceedings Northeastern Forest Tree Improvement Conference written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Forest genetics categories.

Proceedings

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Author :
language : en
Publisher:
Release Date : 1974

Proceedings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Forest genetics categories.

A Taxonomic Study Of Western Canadian Species In The Genus Betula

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Author : Janet Rogge Dugle
language : en
Publisher:
Release Date : 1964

A Taxonomic Study Of Western Canadian Species In The Genus Betula written by Janet Rogge Dugle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Birch categories.

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.

Research Paper Nc

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Author :
language : en
Publisher:
Release Date : 1981

Research Paper Nc written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Forests and forestry categories.

Proceedings Of The Ninth Lake States Forest Tree Improvement Conference August 22 23 1969

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Author :
language : en
Publisher:
Release Date : 1970

Proceedings Of The Ninth Lake States Forest Tree Improvement Conference August 22 23 1969 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Forest genetics categories.

U S D A Forest Service Research Paper Nc

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Author :
language : en
Publisher:
Release Date : 1968

U S D A Forest Service Research Paper Nc written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Forests and forestry categories.

Forestry Research Progress Mcintire Stennis Cooperative Forestry Research Program

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Author : United States. Cooperative State Research Services
language : en
Publisher:
Release Date :

Forestry Research Progress Mcintire Stennis Cooperative Forestry Research Program written by United States. Cooperative State Research Services and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with Forests and forestry categories.

Forestry Research Progress In

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Author : United States. Cooperative State Research Service
language : en
Publisher:
Release Date : 1967

Forestry Research Progress In written by United States. Cooperative State Research Service and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Forests and forestry categories.

U S Forest Service Research Paper Nc

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Author : North Central Forest Experiment Station (Saint Paul, Minn.).
language : en
Publisher:
Release Date : 1968

U S Forest Service Research Paper Nc written by North Central Forest Experiment Station (Saint Paul, Minn.). and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with Forests and forestry categories.