Indigenous breeds of cattle are well adapted to the tropical environment conditions. These breed population is decreasing very drastically in countries like India. Tharparkar is an Indian dual purpose breed. Semen collection and preservation are very important to conserve and preserve this precious germplasm. Production, quality and biochemical composition of semen is affected by seasons. This book explains about semen production, quality and expression of heat shock protein and genes in semen of Tharparkar bulls. This book will be very useful for cattle breeders, researchers and farmers.