Advances in Statistical Methods for the Genetic Dissection of Complex Traits in Plants

Advances in Statistical Methods for the Genetic Dissection of Complex Traits in Plants
Author: Yuan-Ming Zhang
Publisher: Frontiers Media SA
Total Pages: 278
Release: 2024-01-26
Genre: Science
ISBN: 2832543693

Genome-wide association studies (GWAS) have been widely used in the genetic dissection of complex traits. However, there are still limits in current GWAS statistics. For example, (1) almost all the existing methods do not estimate additive and dominance effects in quantitative trait nucleotide (QTN) detection; (2) the methods for detecting QTN-by-environment interaction (QEI) are not straightforward and do not estimate additive and dominance effects as well as additive-by-environment and dominance-by-environment interaction effects, leading to unreliable results; and (3) no or too simple polygenic background controls have been employed in QTN-by-QTN interaction (QQI) detection. As a result, few studies of QEI and QQI for complex traits have been reported based on multiple-environment experiments. Recently, new statistical tools, including 3VmrMLM, have been developed to address these needs in GWAS. In 3VmrMLM, all the trait-associated effects, including QTN, QEI and QQI related effects, are compressed into a single effect-related vector, while all the polygenic backgrounds are compressed into a single polygenic effect matrix. These compressed parameters can be accurately and efficiently estimated through a unified mixed model analysis. To further validate these new GWAS methods, particularly 3VmrMLM, they should be rigorously tested in real data of various plants and a wide range of other species.

Methods for Ecological Research on Terrestrial Small Mammals

Methods for Ecological Research on Terrestrial Small Mammals
Author: Robert McCleery
Publisher: JHU Press
Total Pages: 381
Release: 2022-01-04
Genre: Science
ISBN: 1421442124

All the information researchers, students, and practitioners need to conducted innovative, state-of-the-art research on small mammals. Rodents and insectivores constitute the vast majority of mammals on our planet, yet we often overlook the importance of this group. As seed dispersers, prey species, and disease regulators, these animals are critical to the functioning of our ecological systems. While considerable material exists that describes these species, there has been no dedicated guide explaining how to effectively research them—until now. Methods for Ecological Research on Terrestrial Small Mammals is a one-stop resource compiling all the information readers need to conduct state-of-the-art research on small terrestrial mammals across the globe. The authors cover the full spectrum of issues, from capture, handling, identification, reproduction, demography, and taxonomy to behavior, diet, evolution, diseases, movements, morphometrics, and more. They also: • highlight the latest techniques while carefully explaining the tried-and-tested methods needed to conduct rigorous scientific inquiries; • provide step-by-step examples and case studies, demonstrating how the methods discussed can be used in actual research projects; • compare and contrast methodologies, analytical techniques, and software packages, helping researchers determine which pathways and tools will yield the best results for their studies. A comprehensive and invaluable resource, Methods for Ecological Research on Terrestrial Small Mammals is a must-have for any ecologist working on small mammals.