Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue

Resilience is increasingly part of the discussion on climate change, yet there is a lack of breeding for resilience per se. This experiment examined the genetic parameters of a novel, direct measure of resilience to water deficit in tall fescue (<i>Lolium arundinaceum</i> (Schreb.) Darby...

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Autores principales:	Blair L. Waldron, Kevin B. Jensen, Michael D. Peel, Valentin D. Picasso
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	drought climate change genetics breeding grasslands heritability Agriculture S
Acceso en línea:	https://doaj.org/article/48d799c9e7b14e2c8d236ed57f36a529
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spelling	oai:doaj.org-article:48d799c9e7b14e2c8d236ed57f36a5292021-11-25T16:02:27ZBreeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue10.3390/agronomy111120942073-4395https://doaj.org/article/48d799c9e7b14e2c8d236ed57f36a5292021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4395/11/11/2094https://doaj.org/toc/2073-4395Resilience is increasingly part of the discussion on climate change, yet there is a lack of breeding for resilience per se. This experiment examined the genetic parameters of a novel, direct measure of resilience to water deficit in tall fescue (<i>Lolium arundinaceum</i> (Schreb.) Darbysh.). Heritability, genetic correlations, and predicted gain from selection were estimated for average productivity, resilience, and stability based on forage mass of a tall fescue half-sib population grown under a line-source irrigation system with five different water levels (WL). Resilience was both measurable and moderately heritable (h<sup>2</sup> = 0.43), with gains of 2.7 to 3.1% per cycle of selection predicted. Furthermore, resilience was not correlated with average response over environments and negatively correlated with stability, indicating that it was not a measure of responsiveness to more favorable environments. Genetic correlations among WL ranged from 0.87 to 0.56, however in contrast, resilience was either not or slightly negatively genetically correlated with WL except for moderate correlations with the ‘crisis’ WL. Thus, breeding for improved resilience was predicted to have little effect on forage mass at any given individual water deficit environment. Overall, results indicated that this novel metric could facilitate breeding for improved resilience per se to water deficit environments.Blair L. WaldronKevin B. JensenMichael D. PeelValentin D. PicassoMDPI AGarticledroughtclimate changegeneticsbreedinggrasslandsheritabilityAgricultureSENAgronomy, Vol 11, Iss 2094, p 2094 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	drought climate change genetics breeding grasslands heritability Agriculture S
spellingShingle	drought climate change genetics breeding grasslands heritability Agriculture S Blair L. Waldron Kevin B. Jensen Michael D. Peel Valentin D. Picasso Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue
description	Resilience is increasingly part of the discussion on climate change, yet there is a lack of breeding for resilience per se. This experiment examined the genetic parameters of a novel, direct measure of resilience to water deficit in tall fescue (<i>Lolium arundinaceum</i> (Schreb.) Darbysh.). Heritability, genetic correlations, and predicted gain from selection were estimated for average productivity, resilience, and stability based on forage mass of a tall fescue half-sib population grown under a line-source irrigation system with five different water levels (WL). Resilience was both measurable and moderately heritable (h<sup>2</sup> = 0.43), with gains of 2.7 to 3.1% per cycle of selection predicted. Furthermore, resilience was not correlated with average response over environments and negatively correlated with stability, indicating that it was not a measure of responsiveness to more favorable environments. Genetic correlations among WL ranged from 0.87 to 0.56, however in contrast, resilience was either not or slightly negatively genetically correlated with WL except for moderate correlations with the ‘crisis’ WL. Thus, breeding for improved resilience was predicted to have little effect on forage mass at any given individual water deficit environment. Overall, results indicated that this novel metric could facilitate breeding for improved resilience per se to water deficit environments.
format	article
author	Blair L. Waldron Kevin B. Jensen Michael D. Peel Valentin D. Picasso
author_facet	Blair L. Waldron Kevin B. Jensen Michael D. Peel Valentin D. Picasso
author_sort	Blair L. Waldron
title	Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue
title_short	Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue
title_full	Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue
title_fullStr	Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue
title_full_unstemmed	Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue
title_sort	breeding for resilience to water deficit and its predicted effect on forage mass in tall fescue
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/48d799c9e7b14e2c8d236ed57f36a529
work_keys_str_mv	AT blairlwaldron breedingforresiliencetowaterdeficitanditspredictedeffectonforagemassintallfescue AT kevinbjensen breedingforresiliencetowaterdeficitanditspredictedeffectonforagemassintallfescue AT michaeldpeel breedingforresiliencetowaterdeficitanditspredictedeffectonforagemassintallfescue AT valentindpicasso breedingforresiliencetowaterdeficitanditspredictedeffectonforagemassintallfescue
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Breeding for Resilience to Water Deficit and Its Predicted Effect on Forage Mass in Tall Fescue

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