Lecture 1 - Population Structure and Plant Reproduction Flashcards
what is a population
individuals of the same species which by virtue of their location and time of flowering have immediate potential for interbreeding and therefore share a common genepool
descriptors of genetic structure
- genetic status of the individuals in the population
- Uniformity of the population
why is understanding genetic structure of a population is important
- interpreting data
- choosing breeding methods
What influences population structure
-mode of reproduction
-founding individuals
- immigration and emigration
- mutation
- viability of different genotypes
- human selection
is meiosis involved in asexual reproduction
no
vegetative reproduction
plant tissues other than seed used to reproduce
examples of vegetative reproduction
tubers (potatoes), rhizomes (orchid), stolons (strawberry), bulbs (garlic), and cuttings (ornamental and fruit trees)
apomixis
asexual reproduction through seed developed from an unfertilized egg (seed is entirely of maternal origin)
types of asexual reproduction
vegetative reproduction
apomixis
types of sexual reproduction
selfing (inbreeding)
outcrossing
how to encourage/enforce inbreeding or outcrossing
floral modifications
cleistogamy
fertilization event occurs within an enclosed space to provide a physical barrier prevents outside pollen from getting in
does cleistogamy favor inbreeding or outcrossing
inbreeding
protandry and protogyny
staggered maturation of reproductive organs (female and male parts don’t mature at the same time)
protandry (male or female)
male
