Molecular breeding method for improving cold resistance of rice

Abstract

The invention provides a molecular breeding method for improving cold resistance of rice, and relates to the technical field of rice breeding. The molecular breeding method comprises the following steps that rice with high survival rate and high yield is selected, multi-generation selfing is carried out to obtain a parent 1; rice with cold resistance is selected, and multi-generation selfing is carried out to obtain a parent 2; DNA of the parent 2 is obtained, and the DNA of the parent 2 is introduced into the parent 1; and multi-generation cold-resistant screening is carried out to obtain the rice variety with strong cold resistance, high survival rate and high yield. According to the molecular breeding method for improving the cold resistance of the rice, the DNA of the cold-resistant rice is introduced into the body of the rice with high survival rate and high yield, and then the rice variety with high cold resistance, high survival rate and high yield is obtained through multi-generation cold-resistant screening, so that the cold resistance of the rice is improved, the survival rate of the rice under the cold condition is improved, the influence of cold weather on rice production and heading is prevented, the yield of grains is ensured, and the rice has higher planting value.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a molecular breeding method for improving cold tolerance of rice. Background technique [0002] Rice is a cereal crop belonging to the genus Oryzae, and it is an important food crop. Especially in Asia, more than half of the countries use rice as a staple food. Rice is a temperature-loving plant and is often planted in summer. If it encounters low temperature during the planting process, low temperature It will affect the growth rate of rice seedlings, and in severe cases, it will cause the death of rice seedlings. At the same time, it will also affect the heading rate of rice at the heading stage of rice and affect the yield of rice. [0003] The existing rice with high survival rate and high yield often does not have cold resistance, and it will affect the grain yield when encountering cold weather, while cold-tolerant rice often has a low survival rate and yield, and it ...

AI Technical Summary

Problems solved by technology

[0002] Rice is a cereal crop belonging to the genus Oryzae, and it is an important food crop. Especially in Asia, more than half of the countries use rice as a staple food. Rice is a temperature-loving plant and is often planted in summer. If it encounters low temperature during the planting process, low temperature It will affect the growth rate of rice seedlings, and in severe cases, it will lead to the death of rice seedlings. At the same time, it will also affect the heading rate of rice at the heading stage of rice and affect the yield of rice.

[0003] The existing rice with high survival rate and high yield often does not have cold resistance, and it will affect the grain yield when encountering cold weather, while cold-tolerant rice often has a low survival rate and yield, and it is difficult to achieve better grain yield , the actual planting value is lower

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