Basic concepts of population genetics - Bioversity International

More documents

Recommendations

Info

Phenotype is … The description of all traits of an individual as they concern its morphology, physiology, ecological relationships and behaviour At any given time, the phenotype is the result of the genes of the individual interacting with the environment Copyright: IPGRI and Cornell University, 2003 Population genetics 4 Phenotypic differences can be either qualitative (present or absent) or can be quantitative. Qualitative traits can be classified. Quantitative traits are measured. Individuals share the same phenotype if they look alike. Some genotypes may have the same phenotype. The distinction between genotype and phenotype is important in those traits that are influenced by the environment: two individuals with the same genotype may result in different phenotypes because of the environment. 4
Phenotypic variation Pink Pale cream Dark pink Yellow Red Purple Light blue Copyright: IPGRI and Cornell University, 2003 Population genetics 5 5 Dark cream White Natural populations are phenotypically diverse. The amount of phenotypic diversity is extraordinary and obvious, even at the most spontaneous observation. A population of closely related individuals will show low variability. This is especially critical if environmental conditions change and that population does not have the variation to cope with the change. The population could rapidly move towards extinction. Population genetics deals with phenotypic diversity, especially where it is due to differences in the genotypic composition of individuals.
Page 1 and 2: Genetic diversity analysis with mol
Page 3: Definitions: Population genetics T
Page 7 and 8: Genotype is … The description of
Page 9 and 10: What is polymorphism? ‘Presence
Page 11 and 12: Population structure Three levels o
Page 13 and 14: Allele frequency Allele frequency
Page 15 and 16: Genotype frequency This is the fre
Page 17 and 18: Demonstrating the H-W principle Gen
Page 19 and 20: The chi-square test This hypothesi
Page 21 and 22: Calculating allele frequencies: Exa
Page 23 and 24: Locus A B D … with a codominant m
Page 25 and 26: Locus A Locus B Locus D … with a
Page 27 and 28: ... with a codominant gene having m
Page 29 and 30: Random mating Mating that takes pl
Page 31 and 32: Inbreeding coefficient It compares
Page 33 and 34: Forces shaping genetic diversity M
Page 35 and 36: Migration It is the movement of in
Page 37 and 38: Selection It is the inherited abili
Page 39 and 40: Effective population size Ne is th
Page 41 and 42: Consequences … (continued) A bot
Page 43 and 44: Appendix 1 Copyright: IPGRI and Cor
Page 45 and 46: By now you should know … The bas
Page 47:
Next Measures of genetic diversity
show all

Basic concepts of population genetics - Bioversity International

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?