define lactation period . name 2 breeds of cattle which are selected for cross breeding due to their long lactation period.why are they cross with local breeds
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After giving birth to a calf, the period of time till which mother lactates through its mammary glands to feed their young ones is called lactation period.
Jersey cows and Brown Swiss cows are used for cross breeding as they have longer lactation period. They are used for cross breeding to get a hybrid vigor.
Jersey cows and Brown Swiss cows are used for cross breeding as they have longer lactation period. They are used for cross breeding to get a hybrid vigor.
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Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. Humans have selectively bred plants and animals for thousands of years including: crop plants with better yields.
Explanation:
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