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Full-Text Articles in Physical Sciences and Mathematics
Changes In Gene Expression During Acclimation To Cold Temperatures In White Clover (Trifolium Repens L.), M. Lowe, R. P. Collins, M. T. Abberton
Changes In Gene Expression During Acclimation To Cold Temperatures In White Clover (Trifolium Repens L.), M. Lowe, R. P. Collins, M. T. Abberton
IGC Proceedings (1997-2023)
White clover is an important component of many temperate pastures and improved winter hardiness is a major objective of breeding programmes in many countries. Exposure to cold and fluctuations in temperature are components of winter stress and although some studies have investigated the agronomic and physiological mechanisms of cold tolerance, little research has been carried out to identify the genes involved. We are complementing mapping of quantitative trait loci (QTL) responsible for cold tolerance with studies of variation in gene expression between plants growing at different temperatures. In particular we are initially focusing on the process of acclimation by analysing …
Using Nonlinear Fixed And Mixed Models To Study Acclimation To Heat Stress In Cattle, L. Lan, A. M. Parkhurst, D. A. Spiers, K. M. Eskridge, G. L. Hahn
Using Nonlinear Fixed And Mixed Models To Study Acclimation To Heat Stress In Cattle, L. Lan, A. M. Parkhurst, D. A. Spiers, K. M. Eskridge, G. L. Hahn
Conference on Applied Statistics in Agriculture
Researchers studying acclimation of cattle to heat stress want to know if exposure to heat stress in controlled chambers will help cattle adjust to climatic conditions in the field. The four parameter nonlinear PET model is used to study the relationship between core body temperature and ambient temperature. This model works well when cattle are challenged by heat stress but the model is less useful for thermoneutral conditions. Both proc Nlin and Nlmixed are used to compare and contrast the field parameters between the controlled and the potentially acclimated group. Simulation studies were used to compare the effectiveness of proc …