Principles of Plant Breeding (2+1)

Aplications of polyploids

Applications

1. Low chromosome number.
2.Harvested for vegetative growth and perennial habit.
3. Cross pollinated.
4. Reproduce vegetatively.

Triploids

1. Seedless watermelon crossing tetraploid and diploid
2. Triploid sugar beet- large root, more sugar, and triploid is the optimum ploidy level.

Tetraploids

1. Breeding improved quality
2.Overcoming self incompatibility.
3. Making distant crosses

Allopolyploids

1. Hybridisation between diverse species followed by chromosome doubling.
2. Production of amphidiploids.
3.Combine complimentary characters of two species.
4. Exhibit irregular mitotic division.
5. Irregular meiosis leads to unreduced gamete