The type of recurrent selection that uses homozygous tester is known as

Correct option is D

✅ (d) Recurrent selection for SCA [Specific Combining Ability] • Uses a homozygous tester (usually inbred) to evaluate the combining ability of individuals. • Focuses on identifying non-additive gene effects, i.e., traits expressed only in specific cross combinations. • Suitable for developing hybrids where specific crosses outperform general ones. • Effective in cross-pollinated crops like maize.
❌ (a) Recurrent selection for GCA • Uses a heterozygous tester, targeting additive gene action for broad combining ability.
❌ (b) Reciprocal recurrent selection • Involves two populations used as testers for each other. • Aims to improve both GCA and SCA.
❌ (c) Simple recurrent selection • Selection without a tester; based on phenotype alone. • Less precise for combining ability improvement.