In the barnase-barstar system, transgenic hybrids involve transgenic male-sterile plants with (RJ Pre PG 2016)

✅ Explanation:
-The barnase-barstar system is used to create transgenic male-sterile plants.
-Barnase: A ribonuclease gene from Bacillus amyloliquifaciens that causes cell death when expressed in the tapetum (a tissue nourishing pollen grains), leading to male sterility.
-Barstar: An inhibitor gene from the same bacterium that can prevent the action of Barnase.In this system, the male-sterile plants carry the Barnase gene, while the fertility restorer plants carry the Barstar gene.