Jack of all trades masters novel host plants

Positive genetic correlations in specialist and generalist insect herbivores expanding their diets to novel hosts

C. García-Robledo, Carol C Horvitz

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

One explanation for the widespread host specialization of insect herbivores is the 'Jack of all trades-master of none' principle, which states that genotypes with high performance on one host will perform poorly on other hosts. This principle predicts that cross-host correlation in performance of genotypes will be negative. In this study, we experimentally explored cross-host correlations and performance among families in four species (two generalist and two specialist) of leaf beetles (Cephaloleia spp.) that are currently expanding their diets from native to exotic plants. All four species displayed similar responses in body size, developmental rates and mortality rates to experimentally controlled diets. When raised on novel hosts, body size of larvae, pupae and adults were reduced. Development times were longer, and larval mortality was higher on novel hosts. Genotype×host-plant interactions were not detected for most traits. All significant cross-host correlations were positive. These results indicate very different ecological and evolutionary dynamics than those predicted by the 'Jack of all trades-master of none' principle.

Original languageEnglish
Pages (from-to)38-53
Number of pages16
JournalJournal of Evolutionary Biology
Volume25
Issue number1
DOIs
StatePublished - Jan 1 2012

Fingerprint

generalist
genetic correlation
host plant
herbivore
herbivores
host plants
insect
diet
insects
body size
genotype
mortality
plant genetics
pupa
Chrysomelidae
pupae
beetle
larva
larvae

Keywords

  • Cephaloleia spp.
  • Costa Rica
  • Diet expansions
  • Exotic hosts
  • Genetic correlations
  • Tropical rain forest
  • Zingiberales

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

@article{ddce19936340452eb2eac9d21a6fabdb,
title = "Jack of all trades masters novel host plants: Positive genetic correlations in specialist and generalist insect herbivores expanding their diets to novel hosts",
abstract = "One explanation for the widespread host specialization of insect herbivores is the 'Jack of all trades-master of none' principle, which states that genotypes with high performance on one host will perform poorly on other hosts. This principle predicts that cross-host correlation in performance of genotypes will be negative. In this study, we experimentally explored cross-host correlations and performance among families in four species (two generalist and two specialist) of leaf beetles (Cephaloleia spp.) that are currently expanding their diets from native to exotic plants. All four species displayed similar responses in body size, developmental rates and mortality rates to experimentally controlled diets. When raised on novel hosts, body size of larvae, pupae and adults were reduced. Development times were longer, and larval mortality was higher on novel hosts. Genotype×host-plant interactions were not detected for most traits. All significant cross-host correlations were positive. These results indicate very different ecological and evolutionary dynamics than those predicted by the 'Jack of all trades-master of none' principle.",
keywords = "Cephaloleia spp., Costa Rica, Diet expansions, Exotic hosts, Genetic correlations, Tropical rain forest, Zingiberales",
author = "C. Garc{\'i}a-Robledo and Horvitz, {Carol C}",
year = "2012",
month = "1",
day = "1",
doi = "10.1111/j.1420-9101.2011.02401.x",
language = "English",
volume = "25",
pages = "38--53",
journal = "Journal of Evolutionary Biology",
issn = "1010-061X",
publisher = "Wiley-Blackwell",
number = "1",

}

TY - JOUR

T1 - Jack of all trades masters novel host plants

T2 - Positive genetic correlations in specialist and generalist insect herbivores expanding their diets to novel hosts

AU - García-Robledo, C.

AU - Horvitz, Carol C

PY - 2012/1/1

Y1 - 2012/1/1

N2 - One explanation for the widespread host specialization of insect herbivores is the 'Jack of all trades-master of none' principle, which states that genotypes with high performance on one host will perform poorly on other hosts. This principle predicts that cross-host correlation in performance of genotypes will be negative. In this study, we experimentally explored cross-host correlations and performance among families in four species (two generalist and two specialist) of leaf beetles (Cephaloleia spp.) that are currently expanding their diets from native to exotic plants. All four species displayed similar responses in body size, developmental rates and mortality rates to experimentally controlled diets. When raised on novel hosts, body size of larvae, pupae and adults were reduced. Development times were longer, and larval mortality was higher on novel hosts. Genotype×host-plant interactions were not detected for most traits. All significant cross-host correlations were positive. These results indicate very different ecological and evolutionary dynamics than those predicted by the 'Jack of all trades-master of none' principle.

AB - One explanation for the widespread host specialization of insect herbivores is the 'Jack of all trades-master of none' principle, which states that genotypes with high performance on one host will perform poorly on other hosts. This principle predicts that cross-host correlation in performance of genotypes will be negative. In this study, we experimentally explored cross-host correlations and performance among families in four species (two generalist and two specialist) of leaf beetles (Cephaloleia spp.) that are currently expanding their diets from native to exotic plants. All four species displayed similar responses in body size, developmental rates and mortality rates to experimentally controlled diets. When raised on novel hosts, body size of larvae, pupae and adults were reduced. Development times were longer, and larval mortality was higher on novel hosts. Genotype×host-plant interactions were not detected for most traits. All significant cross-host correlations were positive. These results indicate very different ecological and evolutionary dynamics than those predicted by the 'Jack of all trades-master of none' principle.

KW - Cephaloleia spp.

KW - Costa Rica

KW - Diet expansions

KW - Exotic hosts

KW - Genetic correlations

KW - Tropical rain forest

KW - Zingiberales

UR - http://www.scopus.com/inward/record.url?scp=83555177280&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=83555177280&partnerID=8YFLogxK

U2 - 10.1111/j.1420-9101.2011.02401.x

DO - 10.1111/j.1420-9101.2011.02401.x

M3 - Article

VL - 25

SP - 38

EP - 53

JO - Journal of Evolutionary Biology

JF - Journal of Evolutionary Biology

SN - 1010-061X

IS - 1

ER -