Bottleneck effects on genetic variance for courtship repertoire

Article Abstract:

Examination of additive genetic variances and subsequent phenotypic responses to drift in courtship repertoire of six two-pair founder-flush lines and two control populations of the housefly helps analyze the bottleneck effects on evolutionary potential in mating behavior. The net parent-offspring covariance for a trait is decreased by an additive environmental effect of the phenotype of the mating partner. Directional dominance in a subset of traits is indirectly confirmed by the founder-flush event-generated concerted phenotypic differentiation.

Research, Genetic aspects, Courtship of animals, Mating behavior, Housefly

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Detecting marker-QTL linkage and estimating QTL gene effect and map location using a saturated genetic map

Article Abstract:

A simulation analysis on a backcross population aimed to identify the influence of marker spacing, gene effect and population size on the strength of marker-quantitative trait loci (QTL) linkage studies and on the standard error of maximum likelihood estimates (MLE) of QTL gene effect and map location. The capacity for detection of a QTL was almost the same for a marker spacing of 10 cM as for an unlimited number of markers and fell very little for marker spacing of 20 or 50 cM.

Usage, Observations, Chromosome mapping, Quantitative genetics

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Morgan's hypothesis of the genetic control of development

Article Abstract:

Johanssen's views influenced Morgan's attempts to modify the constructs of Mendel and integrate them with his idea of genetic factors and his method of naming in his initial developmental hypothesis, to link it to embryological growth. The problems associated with his approach to naming and authentic findings prompted Morgan to stop considering genetics as transmission and as development at the same time.

Innovations, Mendel's law, Mendel's laws

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