Procedure of Developing Synthetic Variety and Role in crop improvement

Procedure of Developing Synthetic Variety and Role in crop improvement
Procedure of Developing Synthetic Variety
Year Main breeding activity
First Selection of inbred lines , crossing with a common tester , harvesting top crossed seed separately.
Second Evaluation of top crosses in replicated trial using standard hybrid or open pollinated variety as check. Identification and selection of good general combining inbred lines based on top cross performance.
Third Making all possible single crosses among inbred lines selected for good GCA and harvesting crossed seed of single crosses seperately.
Fourth and fifth Mixing seed of single crosses in equal quantity and seed multiplication by open pollination in isolation for one or two generations.

Role in crop improvement
  • Synthetic varieties have been widely used in forage crops and in crops where pollination control is difficult. The maize breeding programme at CIMMYT, Mexico and the pearl millet breeding programme at ICRISAT, Hyderabad ( to some extent) are based on synthetic varieties generally developed through population improvement.
  • The maize breeding programme in India is placing increasingly greater emphasis on the production of synthetic or composite varieties.In cauliflower Pusa Early Synthetic is a synthetic variety adapted to many environments was developed at IARI

Last modified: Monday, 2 April 2012, 10:10 PM