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Answers
Explanation:
Ans 1.It aims at improving the genetic makeup of the crop plants. Improved varieties are developed through plant breeding. Its objectives are to improve yield, quality, disease-resistance, drought and frost-tolerance and important characteristics of the crops.
Ans2. Steps involved in hybridization -
Selection of the Parents.
Self-breed parents.
Emasculation.
Bagging.
Tagging.
Pollination.
Harvesting.
Storage.
Ans4.Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents
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Answer:
a)It aims at improving the genetic makeup of the crop plants. Improved varieties are developed through plant breeding. Its objectives are to improve yield, quality, disease-resistance, drought and frost-tolerance and important characteristics of the crops.
b)The major steps involved in the process of hybridization are:
Selection of parents.
Emasculation,
Bagging,
Tagging,
Pollination or crossing,
Harvesting F1 seeds,
Further handling of the plants or distribution.
c)Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species exhibit greater biomass, speed of development, and fertility than both parents. Various models have been posited to explain heterosis, including dominance, overdominance, and pseudo-overdominance.