Download or read book Trial Growth Performance of Eucalyptus Urophylla S T Blake written by Tim Vercoe and published by . This book was released on 1994 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Quantitative Study on Growth Basic Wood Density and Pulp Yield in a Breeding Population of Eucalyptus Urophylla S T Blake Grown in KwaZulu Natal written by Francois Van Deventer and published by . This book was released on 2008 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book THE STATE OF THE WORLD s FOREST GENETIC RESOURCES written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-05-25 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: The publication was prepared based on information provided by 86 countries, outcomes from regional and subregional consultations and commissioned thematic studies. It includes: •an overview of definitions and concepts related to Forest Genetic Resources (FGR) and a review of their value; •a description of the main drivers of changes; •the presentation of key emerging technologies; •an analysis of the current status of FGR conservation, use and related developments; •recommendations addressing the challenges and needs. By the FAO Commission on Genetic Resources for Food and Agriculture.
Download or read book Altitudional Variation in Eucalyptus Urophylla S T Blake written by V. P. G. Moura and published by . This book was released on 1977 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eucalyptus urophylla S.T. Blake is a tropical species occurring naturally in a group of islands of the Lesser Sunda Archipelago, beteween 6 and 10 latitude Sourth and between 188 and 128 longitude East. E. urophylla grows in a wide range of soils from almost sea level to 2980 meters in altitude. The climate ranges from hot to cool tropical conditions with a pronounced dry seasson of about three months in the winter. A study was made of genetic variation in E. urophylla taken from an altitudional transect mostly in East Timor with the exception of one seed sample which came from 600m altitude in the nearby island of pantar. The physiological basis of the genetic variation with altitude was examined by growing seedlings fram six altitudes, 600, 1200, 1500, 2100m and 2740m, under controlled conditions. The seeds were found to vary in size with altitude, being larger in the provenances from higher altitudes. Cotyledon size was dependent on seed size and strongly affected the early seedling growth, larger cotyledons resulting in larger seedlings up to four weeks of age. After four weeks the positive relationship of cotyledon size and seedling growth changed, firstly disappearing in the six-week-old seedlings then becaming negative in seedlings at eight weeks of age. The germination of seeds in a range of constant temperature (10 to 40) showed that all provenances germinated equally weel between 20 and 32 C, with an optium around 31C. These was a slightly superior rate of germination of the high altitude provences at the lawest temperature regime. Seedlings grown at four temperatures (12, 20, 25 and 30 C) fram 12 to 22 weeks age showed that all provenances grew best at the two highest temperatures. Howeres, differences were found between provenances with a trend to decreased height and dry weight with increasing altitude. This trend was associated with changes in certain characters. Leaf size and internode length decreased with rise in altitude of seed provenance while leaf thickness increased with altitude. Two conclusions are drawn with regard to field plantations o f E. urophylla in the tropics. The firsts is that seedling selection shoud be delayed until the age at least eight weeks in order to avoid the overriding influence of seed and cotyledon size the early growth of seedlings. The second is that low altitude populations are better adapted to grow in high temperature conditions, but high altitude populations are likely to be more successful in the cool conditions found at high altitudes.
Download or read book The CABI Encyclopedia of Forest Trees written by CABI and published by CABI. This book was released on 2013 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: The CABI Encyclopedia of Forest Trees provides an extensive overview of 300 of the world's most important forest trees. Tropical, subtropical, temperate and boreal trees of major economic importance are included, covering tree species used in agroforestry practices around the world. Many of the species covered are considered to be multipurpose trees with uses extending beyond timber alone; the land uses such as watershed protection or provision of windbreaks, and non-wood uses such as the production of medicines, resins, food and forage, are also listed. Comprehensive information is presented on each tree's importance, with a summary of the main characteristics of the species, its potential for agroforestry use and any disadvantages it possesses. The tree's botanical features such as habit, stem form, foliage, inflorescence, flower and fruit characters and phenology are covered in detail with over 70 color plate pictures to aid identification. Also included are specific sections devoted to pests and diseases, distribution and silvicultural characteristics and practices, including seed sowing, nursery care, planting, thinning, and harvesting. In addition to the wealth of information detailed, based on datasheets from CABI's Forestry Compendium, selected references for further reading are provided for each entry, making this book an essential reference work for forestry students, researchers and practitioners.
Download or read book Growth and Yield Results for a Eucalyptus Grandis X Eucalyptus Urophylla Spacing Trial Situated at Kwambonambi Zululand South Africa written by Trevor Morley and published by . This book was released on 2011 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Allelic Diversity in Cellulose and Lignin Biosynthetic Genes of Eucalyptus Urophylla S T Blake written by Mathabatha Frank Maleka and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Eucalyptus urophylla is one of the most extensively used forest tree species in plantation forestry worldwide. Commonly, E. urophylla is used in hybrid combinations with species possessing better wood properties largely because it is an exceptional grower and it imparts good disease resistance. E. urophylla is endemic to islands of the Lesser Sunda archipelago situated north of Australia. Human induced deforestation practices including urbanization are threatening the existence of several natural populations of the species throughout its range. It has become crucial that efforts be made to conserve the genetic resources in this species. To this end, a forest tree conservation genetics organization called Camcore (http://www.camcore.org) in collaboration with other forestry institutions has initiated seed collection explorations throughout the Lesser Sunda archipelago. Collected seed was sown in provenance test trials to gather information including growth performance of different genotypes in exotic locations. Comprehensive species-wide genetic diversity surveys (at the gene and genome levels) will assist in determining the genetic relationships between different E. urophylla populations, information that is relevant for guiding in situ and ex situ conservation strategies for the species. Nucleotide diversity studies exploit the diversity between homologous gene sequences from different individuals to identify the genetic variation underlying phenotypic traits. Commonly, genetic variation is in the form of single nucleotide polymorphisms (SNPs). Information on SNP diversity coupled with a detailed understanding of the molecular evolution of candidate genes including linkage disequilibrium (LD), selection and recombination may lead to the identification of haplotypes (a combination of SNPs that are inherited together) that associate with trait variation. Thus, sequence diversity surveys in candidate wood biosynthetic genes in E. urophylla may lead to the identification of allelic (SNP) haplotypes that associate with wood quality traits. Such haplotypes will be very valuable in Eucalyptus breeding programmes. The aim of the current M.Sc. study was to investigate levels of nucleotide and allelic (SNP) diversity in three candidate wood biosynthetic genes of E. urophylla. Levels of nucleotide diversity were surveyed in two cellulose biosynthetic genes, namely, cellulose synthase 1 (CesA1) and sucrose synthase 1 (SuSy1), and the lignin biosynthetic gene cinnamyl alcohol dehydrogenase 2 (CAD2) of E. urophylla. This was achieved by sequencing two DNA fragments of approximately 1000 base pairs (bp) from the 5 and 3 ends of one randomly cloned allele (for each gene) in each of the 25 E. urophylla representative individuals. These individuals originated from different families and populations across the seven islands of the Lesser Sunda archipelago. Average levels of nucleotide diversity and SNP haplotype diversity in EuCesA1, EuSuSy1 and EuCAD2 genes were approximately 1% and 0.95, respectively. SNP density was similar among the three genes with one SNP occurring every 40 bp on average. LD declined to minimal levels within 1000 bp in EuCesA1 and EuSuSy1, but remained significant across the 3000 bp length of EuCAD2. An allele-based geographic analysis based on SNP haplotypes revealed that there was no significant clustering of SNP haplotypes based on island of origin. Nonetheless, high SNP density and low LD levels suggest that the E. urophylla may be useful for high-resolution LD mapping and gene-based marker development for marker-assisted breeding programmes.
Download or read book Growth Yield and Financial Results of a Eucalyptus Gradis X Urophylla Spacing Trial at Futululu Zululand written by and published by . This book was released on 2008 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Commonwealth Forestry Review written by and published by . This book was released on 1995 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eucalyptus urophylla S T Blake ecology and silviculture in Vietnam written by Chaw Chaw Sein and published by CIFOR. This book was released on 2011-01-13 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual summarises information on the ecology and silviculture of the species Eucalyptus urophylla S.T. Blake, with an emphasis on Vietnam. It also encompasses growth and yield data from published sources, as well as collected from sites under smallholder industrial plantations in Binh Dinh and Phu Tho provinces, Vietnam. This manual is 1 of 5 that guide smallholder tree planting of five selected tree species in Vietnam. The other four species are: Acacia hybrid, Acacia mangium Willd, Cinnamomum parthenoxylon (Jack) Meisn and Erythrophloeum fordii Oliver.
Download or read book Altitudinal Variation in Eucalyptus Urophylla S T Blake written by Vicente P. G. Moura and published by . This book was released on 1977 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Provenance Variation and Progeny Testing of Eucalyptus Urophylla S T blake Grown at Lad Krating Plantation Chachoensao Province written by Mandy Maid and published by . This book was released on 2006 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetics and Improvement of Forest Trees written by Yuji Ide and published by MDPI. This book was released on 2021-08-16 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest tree improvement has mainly been implemented to enhance the productivity of artificial forests. However, given the drastically changing global environment, improvement of various traits related to environmental adaptability is more essential than ever. This book focuses on genetic information, including trait heritability and the physiological mechanisms thereof, which facilitate tree improvement. Nineteen papers are included, reporting genetic approaches to improving various species, including conifers, broad-leaf trees, and bamboo. All of the papers in this book provide cutting-edge genetic information on tree genetics and suggest research directions for future tree improvement.
Download or read book Eucalyptus Plantations written by Run-Peng Wei and published by World Scientific. This book was released on 2003 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book contains papers presented at a meeting by eucalyptus experts, scholars, consultants and company managers from different countries and regions. The authors report: (1) the most recent advances in eucalyptus research from different perspectives ? genetics, breeding, cultivation techniques, soil nutrition, plantation management, wood utilization, etc.; (2) the world-wide extension and development of the cultivated eucalyptus as a strategic forest tree with great economic, environmental and social significance; (3) plantation management merging ecological, environmental and legal concerns in operations practised by the private sector; (4) new approaches to utilization of eucalyptus woods. This book also represents a successful combination of academic research and practical operation in managing commercial eucalyptus plantations.
Download or read book Silvicultura written by and published by . This book was released on 1983 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PROSEA Plant Resources of South East Asia 11 Auxiliary Plants written by and published by Yayasan Obor Indonesia. This book was released on with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
