Presentation Transcript
Some measures to overcome crossability barriers :Some measures to overcome crossability barriers F1 Healthy plant Normal Case (Inter-varietal)
or intra-specific CASE 1
Some measures to overcome crossability barriers :Some measures to overcome crossability barriers F1 No germination
Or weak plant If fertilization occurs, embryo would form but would be very weak due to underdeveloped endosperm CASE 2 Rescue the embryo Grow it on the growth medium Embryo Rescue Technique
Some measures to overcome crossability barriers :Some measures to overcome crossability barriers P1 P2 X F1 If fertilization does not occur, embryo would not form CASE 3 B
Bridge spp. X Use of Bridge Species Fertile Hybrid
Some measures to overcome crossability barriers :Some measures to overcome crossability barriers P1 P2 X F1 If fertilization does not occur, embryo would not form CASE 4 Mass Pollination Technique Fertile Hybrid (very low frequency)