Question

Sub1 gene present in rice on chromosome 9 confers tolerance to submergence in rice. You are a plant breeder and want to develop submergence tolerant rice variety through marker-assisted selection. What steps will be taken to produce submergence tolerant rice variety? Discuss each step accordingly?

Answer 1

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Waterlogging and floods cause substantial yield losses in cereal crops worldwide, aggravating poverty and food insecurity in developing countries. Climate change scenarios are predicting increases in future incidences and intensities of floods, especially in the tropics and subtropics. Most dryland cereals, such as maize, wheat, and barley, are sensitive to waterlogging, causing up to 20% yield losses in irrigated areas, and even greater losses in rainfed ecosystems exceeding 40% . Waterlogging hampers root growth and function because of oxygen shortages that restrict root respiration.

Answer 2

Waterlogging and floods cause substantial yield losses in cereal crops worldwide, aggravating poverty and food insecurity in developing countries. Climate change scenarios are predicting increases in future incidences and intensities of floods, especially in the tropics and subtropics. Most dryland cereals, such as maize, wheat, and barley, are sensitive to waterlogging, causing up to 20% yield losses in irrigated areas, and even greater losses in rainfed ecosystems exceeding 40% . Waterlogging hampers root growth and function because of oxygen shortages that restrict root respiration.

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