Gain from genomic selection for a selection index in two‐row spring barley

Abstract New breeding programs are faced with many challenges including evaluation of unknown germplasm, initiation of breeding populations that will satisfy short‐ and long‐term breeding goals, and implementation of efficient phenotyping strategies for multiple traits. Genomic selection (GS) is a p...

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Autores principales:	Daniel W. Sweeney, Travis E. Rooney, Mark E. Sorrells
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Plant culture SB1-1110 Genetics QH426-470
Acceso en línea:	https://doaj.org/article/458f1ca0f0084880ac14594b6edcbb62
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spelling	oai:doaj.org-article:458f1ca0f0084880ac14594b6edcbb622021-12-05T07:50:11ZGain from genomic selection for a selection index in two‐row spring barley1940-337210.1002/tpg2.20138https://doaj.org/article/458f1ca0f0084880ac14594b6edcbb622021-11-01T00:00:00Zhttps://doi.org/10.1002/tpg2.20138https://doaj.org/toc/1940-3372Abstract New breeding programs are faced with many challenges including evaluation of unknown germplasm, initiation of breeding populations that will satisfy short‐ and long‐term breeding goals, and implementation of efficient phenotyping strategies for multiple traits. Genomic selection (GS) is a potentially valuable tool for recently established breeding programs to quickly accelerate genetic gain. Genomic selection on selection index (SI) values may increase gain over phenotypic selection but empirical studies remain limited. We compared gain in overall SI value for height, heading date, preharvest sprouting (PHS) resistance, and spot blotch resistance and component traits in two cycles of GS with one round of phenotypic selection (PS) in two‐row spring malting barley (Hordeum vulgare L.). Higher realized gain for SI value, height, and PHS was observed with GS compared with PS but GS did not result in significant gain for heading date and spot blotch. Genetic variances for height and heading date, which had small index weights, were not reduced with GS but variances were substantially reduced for heavily weighted PHS and correlated seed germination traits. Inbreeding was increased by GS compared with PS but restricted mating of high breeding value individuals limited potential inbreeding. Our results indicate GS is a useful method to improve selection on index values with different weights.Daniel W. SweeneyTravis E. RooneyMark E. SorrellsWileyarticlePlant cultureSB1-1110GeneticsQH426-470ENThe Plant Genome, Vol 14, Iss 3, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Plant culture SB1-1110 Genetics QH426-470
spellingShingle	Plant culture SB1-1110 Genetics QH426-470 Daniel W. Sweeney Travis E. Rooney Mark E. Sorrells Gain from genomic selection for a selection index in two‐row spring barley
description	Abstract New breeding programs are faced with many challenges including evaluation of unknown germplasm, initiation of breeding populations that will satisfy short‐ and long‐term breeding goals, and implementation of efficient phenotyping strategies for multiple traits. Genomic selection (GS) is a potentially valuable tool for recently established breeding programs to quickly accelerate genetic gain. Genomic selection on selection index (SI) values may increase gain over phenotypic selection but empirical studies remain limited. We compared gain in overall SI value for height, heading date, preharvest sprouting (PHS) resistance, and spot blotch resistance and component traits in two cycles of GS with one round of phenotypic selection (PS) in two‐row spring malting barley (Hordeum vulgare L.). Higher realized gain for SI value, height, and PHS was observed with GS compared with PS but GS did not result in significant gain for heading date and spot blotch. Genetic variances for height and heading date, which had small index weights, were not reduced with GS but variances were substantially reduced for heavily weighted PHS and correlated seed germination traits. Inbreeding was increased by GS compared with PS but restricted mating of high breeding value individuals limited potential inbreeding. Our results indicate GS is a useful method to improve selection on index values with different weights.
format	article
author	Daniel W. Sweeney Travis E. Rooney Mark E. Sorrells
author_facet	Daniel W. Sweeney Travis E. Rooney Mark E. Sorrells
author_sort	Daniel W. Sweeney
title	Gain from genomic selection for a selection index in two‐row spring barley
title_short	Gain from genomic selection for a selection index in two‐row spring barley
title_full	Gain from genomic selection for a selection index in two‐row spring barley
title_fullStr	Gain from genomic selection for a selection index in two‐row spring barley
title_full_unstemmed	Gain from genomic selection for a selection index in two‐row spring barley
title_sort	gain from genomic selection for a selection index in two‐row spring barley
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/458f1ca0f0084880ac14594b6edcbb62
work_keys_str_mv	AT danielwsweeney gainfromgenomicselectionforaselectionindexintworowspringbarley AT traviserooney gainfromgenomicselectionforaselectionindexintworowspringbarley AT markesorrells gainfromgenomicselectionforaselectionindexintworowspringbarley
_version_	1718372550703054848

Gain from genomic selection for a selection index in two‐row spring barley

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