Principles of Plant Breeding (2+1)

Procedure for Bulk method

1. Hybridization: Parents are selected and crossed
2. F1 generation : F1is space planted more than 200 F1 plants
3. F2-F6 Generation: Planted at commercial seed rate, spacing and harvested as bulk, during this period. Frequency of population changes due to out break of disease or pest.
4. Artificial selection is done, largepopulation is raised,30000-50000 plants in each generation.
5. F7 generation: 50000 plants are space planted about 1000-5000 plants with phenotype is selected and the seeds are harvested separately.
6. F8 generation: Individual plant progenies are single/multi row plants, since progenies are homogygous and harvested in bulk weak and inferior progenies are rejected and 100-300 individual plant progenies with desirable characters.
7. F9 Generation: Preliminary yield trial with standard check, yield and quality parameter is taken for selection.
8. F10---F12 generation: Replicated yield trails are conducted. Yield and its component characters are evaluated along with the check. Superior progenies are released as variety
9. F13 generation: Seed multiplication of the newly released variety and distribution to farmers.