Plant genetic diversity and the struggle to measure selection

Article Abstract:

The combination of coalescence theory and nucleotide sequence data provides a method of measuring selection and plant genetic diversity in population genetics. The method gives an estimate of the extent of genetic diversity. The role of genetic random drift and mutation are considered crucial in molecular evolution. Estimation of the effective population size is possible when genealogy is consistent with the neutral process. Coalescence framework gives a theoretical basis for integration of long evolutionary time periods.

Reports, Measurement, Plant genetics, Natural selection

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Genetic correlation between genetic and parental effects on growth in pigeon squabs

Article Abstract:

Experimental analysis indicates a positive correlation between the parental and genetic effects in pigeon squabs. A low genetic correlation exists between these effects at 28 days due to an enhanced interaction between the parent and the offspring. There is a 0.14 to 0.85 correlation for body weight traits and 0.06 to 0.71 for weight gain traits. Improving the body weight of squabs such that a marketable weight is attained in 21 days enables better production of squabs without affecting parental effects.

Observations, Pigeons

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Genetic and environmental impacts on litter size and early infant survival in three species of callitrichids

Article Abstract:

Environmental factors reduce the repeatability of traits in the anthropoid primates, callitrichids. The estimates of heritability for litter size at birth are high in the species S. fuscicollis, though the heritability estimates at two weeks of age are almost nil. Husbandry changes increase the litter size in C. jacchus. Small sample size and high residual variance reduce heritability estimates. C. jacchus exhibit substantial negative environmental association between litter size and age.

Research, Infants, Primates

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