Size‐independent effects of larval host on adult fitness in Callosobruchus maculatus

Timms, Rebecca

doi:10.1046/j.1365-2311.1998.00158.x

Cited by 25 publications

(25 citation statements)

References 16 publications

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“…The inclusion of maternal effects in the most parsimonious model for developmental rate in the Nigeria ϫ Yemen cross, as well as for the hatching success, larval survival, and fecundity in the Cameroon ϫ Uganda cross, is consistent with the importance of maternal effects reported in C. maculatus and other bruchids (Fox 1993;Fox et al 1995;Timms 1998). In the context of this paper, it is worth noting the significantly positive dominance maternal effects, [dm], for developmental rate in both crosses and for larval survival in the Cameroon ϫ Uganda cross.…”

Section: Discussionsupporting

confidence: 71%

Genetic Architecture of Differences Between Populations of Cowpea Weevil (Callosobruchus Maculatus) Evolved in the Same Environment

Bieri

Kawecki

2003

Evolution

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Abstract. We investigated the genetic architecture underlying differentiation in fitness-related traits between two pairs of populations of the seed beetle Callosobruchus maculatus (Coleoptera: Bruchidae). These populations had geographically distant (Ͼ 2000 km) origins but evolved in a uniform laboratory environment for 120 generations. For each pair of populations (Nigeria ϫ Yemen and Cameroon ϫ Uganda) we estimated the means of five fitness-related characters and a measure of fitness (net reproductive rate R 0 ) in each of the parental populations and 12 types of hybrids (two F 1 and two F 2 lines and eight backcrosses). Models containing up to nine composite genetic parameters were fitted to the means of the 14 lines. The patterns of line means for all traits in the Nigeria ϫ Yemen cross and for four traits (larval survival, developmental rate, female body weight, and fecundity) in the Cameroon ϫ Uganda cross were best explained by models including additive, dominance, and maternal effects, but excluding epistasis. We did not find any evidence for outbreeding depression for any trait. An epistatic component of divergence was detected for egg hatching success and R 0 in the Cameroon ϫ Uganda cross, but its sign was opposite to that expected under outbreeding depression, that is, additive ϫ additive epistasis had a positive effect on the performance of F 2 hybrids. All traits except fecundity showed a pattern of heterosis. A large difference of egg-hatching success between the two reciprocal F 1 lines in that cross was best explained as fertilization incompatibility between Cameroon females and sperm carrying Uganda genes. The results suggest that these populations have not converged to the same life-history phenotype and genetic architecture, despite 120 generations of uniform natural selection. However, the absence of outbreeding depression implies that they did not evolve toward different adaptive peaks.

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Section: Discussionsupporting

confidence: 71%

Genetic Architecture of Differences Between Populations of Cowpea Weevil (Callosobruchus Maculatus) Evolved in the Same Environment

Bieri

Kawecki

2003

Evolution

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“…Several prior studies have shown that rearing host species (Wasserman and Futuyma 1981;Chandrakantha and Mathavan 1986;Chandrakantha et al 1987;Credland 1987;Fox 1993;Kawecki 1995;Timms 1998;van Huis and de Rooy 1998;Boeke et al 2004;Messina 2004a, b;Vamosi 2005) and temperature (Chandrakantha and Mathavan 1986;Chandrakantha et al 1987;Giga and Smith 1987;Guntrip et al 1997;Vidal 2000, 2003a, b;Mbata et al 2005) have large eVects on a variety of traits of C. maculatus, but how these factors interact to aVect reaction norm shape is poorly understood. Using a factorial experimental design, we examine the separate and interactive eVects of rearing host and temperature on egg-to-adult survivorship, egg-to-adult development time, adult body mass, growth rate and female lifetime fecundity of C. maculatus.…”

Section: Introductionmentioning

confidence: 99%

Phenotypic plasticity in a complex world: interactive effects of food and temperature on fitness components of a seed beetle

et al. 2007

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Most studies of phenotypic plasticity investigate the effects of an individual environmental factor on organism phenotypes. However, organisms exist in an ecologically complex world where multiple environmental factors can interact to affect growth, development and life histories. Here, using a multifactorial experimental design, we examine the separate and interactive effects of two environmental factors, rearing host species (Vigna radiata, Vigna angularis and Vigna unguiculata) and temperature (20, 25, 30 and 35 degrees C), on growth and life history traits in two populations [Burkina Faso (BF) and South India (SI)] of the seed beetle, Callosobruchus maculatus. The two study populations of beetles responded differently to both rearing host and temperature. We also found a significant interaction between rearing host and temperature for body size, growth rate and female lifetime fecundity but not larval development time or larval survivorship. The interaction was most apparent for growth rate; the variance in growth rate among hosts increased with increasing temperature. However, the details of host differences differed between our two study populations; the degree to which V. unguiculata was a better host than V. angularis or V. radiata increased at higher temperatures for BF beetles, whereas the degree to which V. unguiculata was the worst host increased at higher temperatures for SI beetles. We also found that the heritabilities of body mass, growth rate and fecundity were similar among rearing hosts and temperatures, and that the cross-temperature genetic correlation was not affected by rearing host, suggesting that genetic architecture is generally stable across rearing conditions. The most important finding of our study is that multiple environmental factors can interact to affect organism growth, but the degree of interaction, and thus the degree of complexity of phenotypic plasticity, varies among traits and between populations.

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“…Among the most important seed predators are the bruchid beetles (Janzen 1971;Southgate 1979). Given that all bruchid larvae feed exclusively in seeds (Southgate 1979), their adult body size, potential fecundity, and longevity are determined by resources obtained during larval development, even though these aspects also depend on whether they continue to feed as adults (Timms 1998;Gianoli et al 2007). Thus, seed quality-mainly the amount of nutrients and concentrations of chemical defensesstrongly influences bruchid behavior, infestation, survival, life-history traits, and fitness (e.g., Fox et al 1994;Thiery et al 1994;Fox and Mousseau 1996;van Huis and de Rooy 1998;Or and Ward 2004).…”

mentioning

confidence: 99%

Relationship Among Phenolic Contents, Seed Predation, and Physical Seed Traits in Mimosa bimucronata Plants

et al. 2009

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Size‐independent effects of larval host on adult fitness in Callosobruchus maculatus

Cited by 25 publications

References 16 publications

Genetic Architecture of Differences Between Populations of Cowpea Weevil (Callosobruchus Maculatus) Evolved in the Same Environment

Genetic Architecture of Differences Between Populations of Cowpea Weevil (Callosobruchus Maculatus) Evolved in the Same Environment

Phenotypic plasticity in a complex world: interactive effects of food and temperature on fitness components of a seed beetle

Relationship Among Phenolic Contents, Seed Predation, and Physical Seed Traits in Mimosa bimucronata Plants

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