Week 5 - Plant Breeding

Question 1

Polygenetic traits?

Answer 1

traits that are controlled by more than one gene

Question 2

Self pollination pros and cons?

Answer 2

Pros:
preserves well adapted genotypes
insure seed set
Cons:
Decrease genetic variability
evolutionary dead end
cannot adapt to changing environmental conditions

Question 3

Cross pollination pros and cons

Answer 3

Pros:
increases genetic variability
strong evolutionary potential
can adapt to changing conditions
Cons:
can destroy well adapted genotypes

Question 4

Pure line method of breeding?

Answer 4

Single line descended from self pollination, used to isolate pure lines from a mixed population

Question 5

Mass selection?

Answer 5

used to either weed out unwanted plant or to preserve desirable plants, used mainly in self-fertilizing plants

Question 6

Pedigree method?

Answer 6

cross the best with the best and fuckin pray it works

Question 7

Backcross breeding

Answer 7

move one or a few traits from the donor parent to a a recurrent parent

Question 8

Self pollinaters result in high levels of what?

Answer 8

high levels of homozygosity,AAbbCCDD this uniform down generations

Question 9

Cross pollination results in high levels of what?

Answer 9

high levels of heterozygosity, AaBBCcDd, lots of diversity and the next generation