Principles of Plant Breeding (2+1)

Classification of crops as per the pollination

I. Natural or Normally self pollinated crops
These crops show high degree of self pollination(>95%) and cross pollination is less than five per cent.E.g., Barley, Ragi, Wheat, Beans, Grams, Groundnut, Sesamum and Tobacco.

II. Naturally or normally cross pollinated crops
a. In these crops cross pollination occurs predominantly(>95%) with a very little (i.e., 5 %)self pollination.E.g.,a. Field Crops i.e., Alfalfa, Castor, Beans, hemp, Maize, Rye, Castor, Mustard, Sugarcane and Sunflower.
b.Horticulture Crops.E.g., Almond, Apples, Banana, Cherries, Chestnut, Citrus, Datepalm, Grapes, Fig, Papaya, Mango, etc.)
c. Vegetables.E.g., All Cruciferous plants.Often cross-pollinated crops.

III. Often cross- pollinated crop:
These crops are normally self-pollinated. However, cross pollination in these crops usually exceeds five per cent due to various agencies.E.g., Sorghum, Cotton, Safflower, etc.