Question

Norin-10 gene is
A) Dwarf gene of rice
B) Dwarf gene of wheat
C) Dwarf gene of tomato
D) Smut resistant gene of wheat

Answer 1

Hint: The two very important genes, Rht1 and Rht2, are provided by Norin-10t which resulted in less height of wheat.

Complete Answer:
- Norin 10 wheat is a semi-dwarf assemblage of plants used for special characteristics with very large ears that was bred by Gonjiro Inazuka in Japan.
- It was registered as one of the cultivated varieties by the Ministry of Agriculture and Forestry in Norinsh0 in 1935.
- Norin 10 helps crops to grow only two feet tall rather than four feet, which helps in the protection of crops from heavy winds.
- Two dwarfing genes Rht-B1b and Rht-D1b also called semi-dwarf variety were released in 1935. iN 1950’s , Norin-10 was used in the US in various breeding programs to improve the quality of wheat in winter wheat because nitrogen fertilisers were used in heavy quantities which was a big problem there. Norin-10 was used in the US in the development of the green revolution wheat varieties.

Thus, the correct answer is B.”Dwarf gene of wheat”.

Note: In India and Pakistan, during the Green Revolution ,Norin-10 was used to increase the productivity of wheat crops upto 60%.