Q. The high yielding hybrid crop varieties to exploit hybrid vigour, the farmers to purchase fresh hybrid seed every year because
A) Hybrid vigour is not long standing due to inbreeding depression
B) They are not allowed to grow their own seed
C) It is always associated with increased heterozygosity
D) Government has accepted Dunkel’s proposals
Explanation
Hybrid vigour or heterosis is a phenomenon where the $F_{1}$ generation of a cross between inbreed lines is superior to the parental lines. The farmers need to purchase fresh hybrid seeds every year because hybrid vigour is not long standing due to inbreeding depression.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.