Evolution and the Genetics of Populations: Experimental results and evolutionary deductions |
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Unfortunately the control stock itself cannot be assumed to be wholly free from
inbreeding depression. The number of pens devoted to it was presumably
reduced during the expansion of the inbred strains, but how much is not clear
until ...
Unfortunately the control stock itself cannot be assumed to be wholly free from
inbreeding depression. The number of pens devoted to it was presumably
reduced during the expansion of the inbred strains, but how much is not clear
until ...
128 ページ
Numbers, means, and coefficients of variability (CV) of weights within litters of two
inbred strains of mice, Fl> and F2. Source: Chai 1957. The inbreds were derived
from strains selected for large and small size, P! and PS, respectively.
Numbers, means, and coefficients of variability (CV) of weights within litters of two
inbred strains of mice, Fl> and F2. Source: Chai 1957. The inbreds were derived
from strains selected for large and small size, P! and PS, respectively.
135 ページ
The index of weaning weight, W, log ( W — 80 gm), of controls and five inbred
strains (from litters adjusted to a size of 2.5) fluctuated in close parallelism (92%
on the average determined by the annual grand average, 8% by deviations).
The index of weaning weight, W, log ( W — 80 gm), of controls and five inbred
strains (from litters adjusted to a size of 2.5) fluctuated in close parallelism (92%
on the average determined by the annual grand average, 8% by deviations).
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alleles average breed cage chaetae chapter characters chromosomes coefficient components correlation crossbreds crosses decline degree of dominance differentiation diploids directional selection disruptive selection Drosophila effects environmental equilibrium estimates evolution expected experiments factors favorable females fixation flies foundation stock gene frequencies GENERAT1ONS genetic variance genotypes guinea pigs heritability heterallelic heterosis heterotic heterozygotes heterozygous homozygotes homozygous hypothesis inbred lines inbred strains inbreeding depression increase indicated interaction systems less lethal litter load loci locus maize males mass selection mean selective value melanogaster mice minus selection modifiers mutation rate natural selection Nettlebed nongenetic observed offspring otocephaly overdominance pairs parents percentage phenotypic population probably production quantitative variability random bred random mating ratio recessive relative respect segregation selective peak semidominant showed sib mating significant species strain 35 studied tests threshold tion viability weight wild-type zygotes