Vol. 11, Special Issue 5 (2022)

Author(s):
BV Sudhakar, Yerru Bhavya and Jetti Harika

Abstract:
Difference in body weight between male and female broiler birds at marketing age is quite common. Male broiler birds attain marketing body weight earlier than female birds, thereby reducing feed costs. In ovo injection of aromatase inhibitors into hatching broiler eggs at 6.5 days of incubation resulted in a higher proportion of hatched male chicks. This is because aromatase inhibitors caused the female embryos to develop a male phenotype without any change in the genotype. Aromatase inhibitors did not have any effect on the male embryos. There was no change in the genotype or phenotype of male chicks. Aromatase inhibitors occur naturally in tomato, garlic mushroom and other food substances. Chemical aromatase inhibitors like clomiphene citrate, tamoxifen, atrazine, imazalil and fadrazole have been studied.