Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar

Abstract Increasing the rate of food consumption is a common adaptive strategy that allows herbivores to compensate for declines in nutrient concentrations in plant tissues. Herbivores that are better able to compensate for dietary dilution may have selective advantages under nutritionally poor cond...

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Autor principal:	Kwang Pum Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8d8f848756254273a167a7fa46e20169
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spelling	oai:doaj.org-article:8d8f848756254273a167a7fa46e201692021-12-02T12:30:28ZGenetic variation in compensatory feeding for dietary dilution in a generalist caterpillar10.1038/s41598-017-07822-42045-2322https://doaj.org/article/8d8f848756254273a167a7fa46e201692017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07822-4https://doaj.org/toc/2045-2322Abstract Increasing the rate of food consumption is a common adaptive strategy that allows herbivores to compensate for declines in nutrient concentrations in plant tissues. Herbivores that are better able to compensate for dietary dilution may have selective advantages under nutritionally poor conditions. In order for compensatory feeding to respond to selection, there must be standing heritable variation for this trait. However, empirical data substantiating the adaptive significance and genetic variability of compensatory feeding are rare. By employing a full-sib, split-brood design, this study presents quantitative genetic analyses on the nutrient consumption rates of the generalist caterpillar, Spodoptera exigua, raised on semi-synthetic diets differing in nutrient concentrations. When encountering a diluted diet, caterpillars exhibited a compensatory increase in food consumption rate, but the extent of this increase was not sufficient to fully compensate for dietary dilution. A significant gene-environment interaction for consumption rate indicated that the capacity of caterpillars to compensate for dietary dilution varied across genotypes. The broad-sense heritability of compensatory feeding was 0.51. Caterpillar genotypes with a higher compensatory capacity suffered lower performance losses on the diluted diet than did those with a lower capacity. This study has implications for understanding how herbivores can evolutionarily respond to nutritional challenges.Kwang Pum LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kwang Pum Lee Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
description	Abstract Increasing the rate of food consumption is a common adaptive strategy that allows herbivores to compensate for declines in nutrient concentrations in plant tissues. Herbivores that are better able to compensate for dietary dilution may have selective advantages under nutritionally poor conditions. In order for compensatory feeding to respond to selection, there must be standing heritable variation for this trait. However, empirical data substantiating the adaptive significance and genetic variability of compensatory feeding are rare. By employing a full-sib, split-brood design, this study presents quantitative genetic analyses on the nutrient consumption rates of the generalist caterpillar, Spodoptera exigua, raised on semi-synthetic diets differing in nutrient concentrations. When encountering a diluted diet, caterpillars exhibited a compensatory increase in food consumption rate, but the extent of this increase was not sufficient to fully compensate for dietary dilution. A significant gene-environment interaction for consumption rate indicated that the capacity of caterpillars to compensate for dietary dilution varied across genotypes. The broad-sense heritability of compensatory feeding was 0.51. Caterpillar genotypes with a higher compensatory capacity suffered lower performance losses on the diluted diet than did those with a lower capacity. This study has implications for understanding how herbivores can evolutionarily respond to nutritional challenges.
format	article
author	Kwang Pum Lee
author_facet	Kwang Pum Lee
author_sort	Kwang Pum Lee
title	Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
title_short	Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
title_full	Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
title_fullStr	Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
title_full_unstemmed	Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
title_sort	genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8d8f848756254273a167a7fa46e20169
work_keys_str_mv	AT kwangpumlee geneticvariationincompensatoryfeedingfordietarydilutioninageneralistcaterpillar
_version_	1718394347345412096

Genetic variation in compensatory feeding for dietary dilution in a generalist caterpillar

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