Early Genetic Testing for Loblolly Pine (pinus Taeda L.) Growth Traits
Author: Claire Grace Williams
Publisher:
Published: 1986
Total Pages: 156
ISBN-13:
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Author: Claire Grace Williams
Publisher:
Published: 1986
Total Pages: 156
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DOWNLOAD EBOOKAuthor: Joshua Pope Adams
Publisher:
Published: 2005
Total Pages: 228
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DOWNLOAD EBOOKAuthor: Bin Xiang
Publisher:
Published: 2000
Total Pages: 0
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DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1995
Total Pages: 54
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DOWNLOAD EBOOKAuthor: Carol G. Wells
Publisher:
Published: 1969
Total Pages: 4
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DOWNLOAD EBOOKLoblolly pine (Pinus taeda 1.) trees were sampled to determine the effect of growth flush, crown position of pole trees, and winter temperature extremes upon the nutrient content of needles. Winter temperatures did not have an important influence upon elemental content. because concentrations of several elements differed for the first, second, and third growth flush of needles, needle samples should be collected in winter months from the previous spring's first flush near the top of the tree.
Author: Michael Steven Waxler
Publisher:
Published: 1980
Total Pages: 166
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DOWNLOAD EBOOKAuthor: Sreenath R. Palle
Publisher:
Published: 2011
Total Pages:
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DOWNLOAD EBOOKGene expression analyses using native populations can provide information on the genetic and molecular mechanisms that determine intraspecific variation and contribute to the understanding of plant development and adaptation in multiple ways. Using quantitative real time - polymerase chain reaction (qRT-PCR), we analyzed the expression of 111 genes with probable roles in wood development in 400 loblolly pine individuals belonging to a population covering much of the natural range. Association mapping techniques are increasingly being used in plants to dissect complex genetic traits and identify genes responsible for the quantitative variation of these traits. We used candidate-gene based association studies to associate single nucleotide polymorphisms (SNPs) in candidate genes with the variation in gene expression. The specific objectives established for this study were to study natural variation in expression of xylem development genes in loblolly pine (Pinus taeda L.) using qRT-PCR, to associate SNPs in candidate genes with the variation in gene expression using candidate-gene based association analyses and to detect loblolly pine promoter polymorphisms and study their effect on gene expression. Out of the 111 genes analyzed using qRT-PCR, there were significant differences in expression among clones for 106 genes. Candidate-gene based association studies were performed between 3937 single nucleotide polymorphisms (SNPs) and gene expression to associate SNPs in candidate genes with the variation in gene expression. To the best of our knowledge, this is the first association genetic study where expression of a large number of genes, analyzed in a natural population, has been the phenotypic trait of interest. We cloned and sequenced promoters of 19 genes, 16 of which are transcription factors involved in wood development and drought response. SNP discovery was done in 13 of these promoters using a panel of 24 loblolly pine clones (unique genotypes). SNP genotyping is underway in the entire association population and association analyses will be done to study the effects of promoter SNPs on gene expression. The results from this project are promising and once these associations have been tested and proved, we believe that they will help in our understanding of the genetics of complex traits.
Author: Roy Wesley Stonecypher
Publisher:
Published: 1966
Total Pages: 294
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DOWNLOAD EBOOKAuthor: W. E. Balmer
Publisher:
Published: 1975
Total Pages: 8
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DOWNLOAD EBOOKAuthor: Brian Stephen Baltunis
Publisher:
Published: 2005
Total Pages:
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DOWNLOAD EBOOKABSTRACT: Loblolly pine is the most important commercial tree species in the southern United States with over 1.1 billion seedlings planted annually. With elite genotypes becoming available, several forest industry companies in the southeastern United States are developing rooted cutting and somatic embryogenesis programs aiming towards deployment of tested clones or families. However, before clones can be deployed, sufficient data need to be collected on the population in order to have reliable information about the clones for deployment decisions. This dissertation reports on the genetic effects of rooting ability and early growth traits in nearly 2,200 clones of loblolly pine from 70-full-sib families.