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Question

Semi-dwarf rice variety IR8 was developed in
  1. Taiwan
  2. India
  3. Philippines
  4. China

A
Taiwan
B
India
C
Philippines
D
China
Solution
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The development of Semidwarf rice varieties has revolutionized rice cultivation. These varieties were derived from dee-geo-gen, a dwarf, early –maturing variety of Japonica rice from Taiwan.
Taichung Native 1 (TN1), developed in Taiwan and IR8, developed at IRRI (International Rice Research Institute), Philippines, were introduced in India in 1966. They were extensively grown for a few years but were later replaced by superior semi-dwarf varieties developed in India, e.g., Jaya, Rama, etc.
The Semidwarf rice varieties are lodging resistant, fertilizer responsive, high yielding and photoinsensitive.
So, the correct answer is 'Philippines'.

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