Thomas D. Byram

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First-generation selection (FGS) and second-generation selection (SGS) breeding populations of loblolly pine from east Texas were studied to estimate the genetic diversity, population structure, linkage disequilibrium (LD), signatures of selection and association of breeding traits with a genome-wide panel of 4,264 single nucleotide polymorphisms (SNPs).(More)
Southern pine cooperative breeding programs currently emphasize genetic improvement of growth rates. When a deployment population, typically a seed orchard, is established, there is an opportunity to emphasize traits other than growth rate to maximize the profit of individual cooperators in the breeding program. We studied a Southeast Texas breeding(More)
Loblolly pine (Pinus taeda L.) is one of the most widely planted and commercially important forest tree species in the USA and worldwide, and is an object of intense genomic research. However, whole genome resequencing in loblolly pine is hampered by its large size and complexity and a lack of a good reference. As a valid and more feasible alternative,(More)
The Western Gulf Forest Tree Improvement Program (WGFTIP) continued to adjust to changing circumstances throughout 2006. The response to 200 hurricanes Katrina and Rita spilt over into 2006 as one or the other of these two storms damaged nearly every orchard complex in the states of Mississippi, Louisiana, and Texas. In the aftermath of the storms,(More)
Natural genetic diversity within and among species is the basis of most plant breeding programs. It relies on variation in DNA sequences but also on variability in the presence and absence of genes and regulatory elements, or " structural polymorphisms " (SP). The objectives of this project are to characterize the extent of SP between and within species in(More)
7 The year 2001 was one of change for the cooperative in many important ways. Industry consolidation and the shifts in land ownership patterns continued to accelerate. International Paper Company's acquisition of Champion International , which was actually completed in 2000, resulted in a loss of a cooperative member in 2001. Fortunately, this occurred(More)
4 5 The Western Gulf Region of the United States has experienced two consecutive years of drought. While the 1999 weather was not as severe as the drought of 1998, these dry years have had a cumulative effect on the tree improvement programs in the region. The drought has contributed to a short-term increase in demand for operational seedlings. Most of the(More)
Invasive plants decrease biodiversity, modify vegetation structure, and inhibit growth and reproduction of native species. Japanese honeysuckle (Lonicera japonica Thunb.) is the most prevalent invasive vine in the forestlands of eastern Texas. Hence, we aimed to identify potential factors influencing the distribution of the species, quantify the relative(More)