Download or read book Provenance Variation Genetic Variance and Age to age Correlation in White Spruce Picea Glauca Moench Voss and Their Implications for Advanced Generation Breeding written by Jianyuan Wang and published by . This book was released on 2000 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report written by Minnesota Tree Improvement Cooperative and published by . This book was released on 2010 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2000 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inheritance of budbreak and correlation with early height growth in white spruce Picea glauca from New England written by Ronald C. Wilkinson and published by . This book was released on 1977 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1999 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Variation in Early Field Performance of White Spruce Picea Glauca Moench Voss in Central America written by Christine Ruth Hansen and published by . This book was released on 1995 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetics of White Spruce written by Hans Nienstaedt and published by . This book was released on 1972 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breeding for Wood Quality written by Patrick Lenz and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'épinette blanche (Picea glauca [Moench] Voss) est l'une des essences les plus importantes pour l'industrie forestière au Canada et son bois est apprécié pour diverses utilisations. De nombreuses études nous permettent de prédire des pertes de la qualité du bois avec l'utilisation accrue d'arbres provenant de plantations et en raison d'une sélection génétique axée uniquement sur la croissance. L'amélioration génétique et la biologie moléculaire pourraient être appliquées pour sélectionner des arbres ayant un ensemble de propriétés plus désirables et ainsi neutraliser la perte de qualité du bois. L'objectif de cette thèse était de déterminer les paramètres génétiques essentiels à cette tâche, notamment, l'héritabilité et les corrélations des principales propriétés du bois chez l'épinette blanche. Dans la présente étude, des carottes de bois ont été récoltées de 375 arbres couvrant 25 familles issues de pollinisation libre et venant d'un test de provenance-descendances répété sur trois sites dans la province de Québec. Avec le système SilviScan des profils de haute résolution ont été obtenus de la moelle à l'écorce pour différentes propriétés du bois liées à la force mécanique (par exemple, la densité du bois et la rigidité) et à l'anatomie des cellules (dont l'épaisseur de la paroi et le diamètre cellulaire). Des analyses statistiques ont indiqué un contrôle génétique modéré à élevé pour les propriétés du bois, surtout dans le bois initial. Les valeurs d'héritabilité étaient généralement plus basses dans les cernes près de la moelle et dans le bois final. Il n'y a que le contrôle génétique de l'angle des microfibrilles (AMF) qui ne variait pas significativement entre les cernes. La plupart des corrélations génétiques et phénotypiques entre différentes propriétés étaient basses près de la moelle mais augmentaient avec l'âge et se stabilisaient au niveau du bois de transition. Les fortes corrélations observées entre le bois juvénile et le bois de transition permettent d'anticiper une sélection précoce efficace à l'âge cambial de 8 à 10. Nos observations indiquent un très bon potentiel pour la sélection précoce de l'AMF autour de l'âge 4 ; mais l'AMF est un critère de sélection peu pratique en raison de son coût élevé. En plus, la sélection directe des propriétés mécaniques serait limitée par un contrôle génétique faible à modéré. Notre étude montre qu'une approche efficace pour maîtriser ce problème est l'amélioration indirecte de la rigidité en effectuant une sélection par indice incluant la densité du bois et la longueur des carottes. Il semble aussi difficile d'améliorer simultanément les propriétés mécaniques du bois et les propriétés anatomiques des fibres liées à la fabrication des pâtes et papiers, en raison des corrélations fortement défavorables. Les résultats de cette thèse contribueront à rendre l'amélioration génétique des propriétés du bois plus accessible et plus efficace. Ils permettront à long terme de mieux valoriser les bois d'épinette blanche issus des plantations futures.

Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 1985 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Local Provenance Studies of White Spruce Picea Glauca Moench VOSS in the Province of Manitoba written by S. Segaran and published by . This book was released on 1977 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Variation in the Monoterpene Composition of White Spruce picea Glauca moench Voss written by Ronald C. Wilkinson and published by . This book was released on 1971 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Genetic Variation of Branch Characteristics in a Minnesota Population of White Spruce Picea Glauca Moench Voss written by Robert Edward Merrill and published by . This book was released on 1981 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adaptive Variation and Age age Correlations of Picea Glauca from the 194 White Spruce Series Provenance Tests at the Petawawa Research Forest in Eastern Ontario written by Steven Carl Sarazin and published by . This book was released on 2001 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: To demonstrate the adaptive variation of white spruce to eastern Ontario climate conditions, a statistical analysis was completed of height, diameter, and survival measurements. Petawawa tests contained 75 provenances originating from various parts of Canada and the United States.

Download or read book Genetic Variation in Early Field Performance of White Spruce Picea Glauca Moench Voss in Central Alberta written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nursery Growth Patterns of All Range Provenance Trials of White Spruce Picea Glauca Moench Voss written by S. Segaran and published by . This book was released on 1978 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Age age Correlations and Breeding Zone Development from the 410 series of White Spruce Provenance Experiments written by Joel Thomas Symonds and published by . This book was released on 2003 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Parameters and Age written by and published by . This book was released on 1994 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tree breeding programs rely on a cycle of recurrent selection and testing. If some kinds of selection could be done at an early age, these could be used in an advanced generation breeding strategy as a means of shortening the cycle. Several genetic tests of black spruce have been established in the Maritimes, many of which are sufficiently advanced in age to contribute useful information on issues related to the merits of alternative breeding strategies. This note reviews a study that examined data from three independent series of black spruce test material established at 15 field locations, two retrospective outdoor nursery tests up to 6 years of age, and four retrospective greenhouse tests ranging from one to four growing cycles. Correlations between field and nursery performance are noted and the impact of early clonal selection is assessed.