Associations of fecundity with adult size in the cotton stainer bug Dysdercus fasciatus

Kasule, F. K.

doi:10.1038/hdy.1991.35

Cited by 12 publications

(8 citation statements)

References 34 publications

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“…For instance there is a strong positive correlation between PM and 1/RI in females within the Locust Tree that is absent within the oak (Table 4). This correlation indicates a higher tolerance to the stress of larger individuals, which has been reported in papers on other insects (Holloway 1986; Kasule 1991b).…”

Section: Discussionsupporting

confidence: 82%

Host plant effects on the genetic variation and correlations in the individual performance of the Gypsy Moth

et al. 1998

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Summary1. Quantitative genetic analysis of variation in host-use ability was performed in an extremely polyphagous species -the Gypsy Moth. Various life-history traits were investigated by applying a split-family two-environment experimental design, where 30 full-sibling families were reared on oak and Locust Tree leaves. 2. Feeding on Locust Tree leaves decreased preadult viability, prolonged development time, decreased pupal mass both in males and females, and decreased reproductive effort in females. 3. The majority of broad-sense heritabilities did not change across host plants. 4. Significant expression of genetic variation in diet breadth was observed for development time and pupal mass both in males and females, but not for female reproductive effort traits. The heritabilities of plasticities were, on average, lower than heritabilities of the traits themselves. 5. The majority of genetic correlations between the host plants were significantly positive. The only trade-off was found between reciprocal value of reproductive index and the average mass of a fertilized egg within oak. This means that selection for the decrease in relative reproductive investment (under starvation during gradation) will be followed by laying larger eggs. Given that the Gypsy Moth has a cyclic population dynamics, this negative genetic correlation could have a role in maintaining genetic variability in this species.

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Section: Discussionsupporting

confidence: 82%

Host plant effects on the genetic variation and correlations in the individual performance of the Gypsy Moth

et al. 1998

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“…Some recent work has focused on determining the effect of different environments on adapted genetic architecture, and it has been demonstrated that genetic architecture is, in many cases, environment dependent (Giesel et al 1982;Murphy et al 1983;Via 1984;Service and Rose 1985;Giesel 1986;Groeters and Dingle 1987;Gebhardt and Stearns 1988;Holloway et al 1990;Kasule 1991). The levels of environmental heterogeneity found in laboratory situations are almost invariably less than the levels found in nature.…”

Section: Discussionmentioning

confidence: 99%

“…1983;Via 1984;Service and Rose 1985;Giesel 1986;Groeters and Dingle 1987;Gebhardt and Stearns 1988;Holloway et ai. 1990;Kasule 1991;Thomas and Barker 1993), and it may be erroneous to predict the response to selection in the wild based on genetic architecture measured in the laboratory. There are no direct tests of the stability of genetic variance/covariance matrices between the laboratory-type environment, where most quantitative genetic studies are performed, and the more variable field environment.…”

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confidence: 99%

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The Effect of a Variable Environment on the Genetic Correlation Structure in a Field Cricket

Simons

Roff

1996

Evolution

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Abstract.-The evolutionary trajectory of a trait depends not only on the presence of genetic variation, but also on the pattern of genetic correlations (r g ) among traits. Genetic correlations are most easily measured under homogeneous, controlled laboratory conditions, whereas natural populations typically experience a higher degree of environmental variability. The effect of environmental variability on genetic correlations in the cricket, Gryllus pennsylvanicus, was studied by measuring genetic correlations within and between two environments differing in levels of environmental heterogeneity. Within-environment r g among morphological traits measured in the homogeneous laboratory environment were found to be reliable predictors of r g measured in the experimental field environment. Laboratory measures of r g involving life-history traits, though, were not found to reflect the same correlations measured in the heterogeneous environment. A significant negative genetic correlation between fecundity and developmental time was found in the field environment, yet was not detectable when measured in the laboratory. Phenotypic correlations may be obtained much more easily than genetic correlations, but their usefulness in evolutionary inference depends on the pattern of similarity between the two correlations. A comparison of genetic and phenotypic correlations revealed a close match between the two measures for morphological traits, but revealed only broad similarities when considering life-history traits. Male-female genetic correlations between morphological traits were high (all r g > 0.73) and were consistently higher in the field environment than in the laboratory. The genetic correlations between the sexes in developmental time followed the same trend, but the male-female genetic correlation of gonad weights was low in both environments. Across-environment correlations were found to be strong for morphological traits and for gonad weight, whereas the genetic expression of developmental time was found to be dependent on the environment in which the crickets were raised.

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“…is reported. The genetic association of fecundity with adult size in this species is described in another paper (Kasule, 1991). Moisture was used as an environmental variable in the study because it seemed that it may be an important factor contributing to life-history variation in Dysdercus species (Pearson, 1958;Derr, 1980a).…”

Section: Introductionmentioning

confidence: 99%

Quantitative variation in adult size and fecundity of the cotton stainer bug Dysdercus fasciatus

Kasule

1991

Heredity

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Genetic variation in adult size and fecundity was studied in the cotton stainer bug Dysdercus fasciatus in the laboratory using a split-family, two-environment, half-sib, full-sib design. Groups of siblings were grown in either a benign or a stressful moisture enviromnent. Sib analysis in each environment revealed additive genetic variance for adult size and fecundity only in the benign environment. Heritability estimates were zero for adult size and low for fecundity when averaged over the two environments. A substantial component of the phenotypic variance in adult size and fecundity was due to genotype-by-environment interaction. This result indicates that different genotypes would be favoured in different conditions if the selection occurred in a heterogeneous moisture environment.

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Associations of fecundity with adult size in the cotton stainer bug Dysdercus fasciatus

Cited by 12 publications

References 34 publications

Host plant effects on the genetic variation and correlations in the individual performance of the Gypsy Moth

Host plant effects on the genetic variation and correlations in the individual performance of the Gypsy Moth

The Effect of a Variable Environment on the Genetic Correlation Structure in a Field Cricket

Quantitative variation in adult size and fecundity of the cotton stainer bug Dysdercus fasciatus

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