William T. B. Thomas

New loci and candidate genes in spring two-rowed barley detected through meta-analysis of a field trial European network

Francesc Montardit-Tardà, Ana Maria Casas, William T. B. Thomas, Florian Schnaithmann et autres

KEY MESSAGE: A dense genome-wide meta-analysis provides new QTLs, reveals breeding history trends and identifies new candidate genes for yield, plant height, grain weight, and heading time of spring barley. This study contributes new knowledge on quantitative trait loci (QTLs) and candidate …

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Molecular Marker-Assisted versus Conventional Selection in Barley Breeding

William T. B. Thomas

Conventional barley breeding involves hybridizing parents that complement each other for desirable characteristics and selecting superior recombinants from among the progeny. This relies upon the presence of genetic variation for the characters and a suitable selection screen to identify desirable lines. The …

New loci and candidate genes in spring two-rowed barley detected through meta-analysis of a field trial European network

Francesc Montardit-Tardà, Ana Maria Casas, William T. B. Thomas, Florian Schnaithmann et autres

Abstract This study contributes new knowledge on quantitative trait loci (QTLs) and candidate genes for adaptive traits and yield in two-rowed spring barley. A meta-analysis of a network of field trials, varying in latitude and sowing date, with 151 cultivars across several …

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Trends of genetic changes uncovered by Env- and Eigen-GWAS in wheat and barley

Rajiv K. Sharma, James Cockram, Keith A. Gardner, Joanne Russell et autres

KEY MESSAGE: Variety age and population structure detect novel QTL for yield and adaptation in wheat and barley without the need to phenotype. The process of crop breeding over the last century has delivered new varieties with increased genetic gains, resulting in …

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Trends of genetic changes uncovered by Env- and Eigen-GWAS in wheat and barley

Rajiv K. Sharma, James Cockram, Keith A. Gardner, Joanne Russell et autres

Abstract The process of crop breeding over the last century has delivered new varieties with increased genetic gains, resulting in higher crop performance and yield. However in many cases, the underlying alleles and genomic regions that have underpinned this success remain unknown. …

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Association mapping of malting quality traits in UK spring and winter barley cultivar collections

Mark E. Looseley, Luke Ramsay, Hazel J. Bull, John Stuart Swanston et autres

KEY MESSAGE: Historical malting quality data was collated from UK national and recommended list trial data and used in a GWAS. 25 QTL were identified, with the majority from spring barley cultivar sets. In Europe, the most economically significant use of barley …

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Genome‐Wide Association Analysis of Grain Yield‐Associated Traits in a Pan‐European Barley Cultivar Collection

Xin Xu, Rajiv K. Sharma, Alessandro Tondelli, Joanne Russell et autres

A collection of 379 Hordeum vulgare cultivars, comprising all combinations of spring and winter growth habits with two and six row ear type, was screened by genome wide association analysis to discover alleles controlling traits related to grain yield. Genotypes were obtained …

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Contrasting genetic regulation of plant development in wild barley grown in two European environments revealed by nested association mapping

Paul Herzig, Andreas Maurer, Vera Draba, Rajiv K. Sharma et autres

Barley is cultivated more widely than the other major world crops because it adapts well to environmental constraints, such as drought, heat, and day length. To better understand the genetic control of local adaptation in barley, we studied development in the nested …

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Structural and Temporal Variation in Genetic Diversity of European Spring Two‐Row Barley Cultivars and Association Mapping of Quantitative Traits

Alessandro Tondelli, Xin Xu, Marc Moragues, Rajiv K. Sharma et autres

Two hundred sixteen barley ( Hordeum vulgare L.) cultivars were selected to represent the diversity and history of European spring two‐row barley breeding and to search for alleles controlling agronomic traits by association genetics. The germplasm was genotyped with 7864 gene‐based single …

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From: William T. Thomas

William T. B. Thomas

A Study of the Effectiveness of Referrals

Joseph J. Parnicky, David Lawrence Anderson, Charles M. L. S. Nakoa, William T. B. Thomas

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