Principles of Plant Breeding (2+1)

Advance varietal trials

Advance varietal trials (AVT-1)

• Advance varietal trial is constituted by the entries promoted from IVT on the criteria specified above.
  
• Limited number of entries in AVT-1 (not exceeding 16) is tested along with a minimum of three checks comprising of national check, zonal check and local check.
  
• All these entries are evaluated in a randomized block design with 3-4 replications at the different locations.
  
• The monitoring is done by the same team as given for IVT.
  
• Besides the agronomic and morphological observations, the additional data may be generated by the co-operators on disease and insect-pest resistance, and quality.
  
• Again, if a variety gives significant superior performance by a margin of 10% over the, best performing check in combination with other attributes is promoted to next stage
Advance varietal trials (AVT-II)

• Same steps are followed as mentioned under AVT-1. However, the additional data to be generated at this stage.
  
• Response to agronomic variables such date of sowing, population densities and weedicide may be recorded.
  
• Data on diseases, insect-pests, quality parameters and abiotic stresses may also be recorded and discussed during the workshop.
  
• If the variety gives outstanding performance over the check (by a margin of 10%) besides having all the favourable attributes, then the proposal for identification of a given variety is submitted by the concerned breeder on a variety identification proforma specified by the ICAR