Breeding method for new varieties of drought-resistant wheat

Abstract

The invention belongs to the field of genetics and discloses a breeding method for new varieties of drought-resistant wheat. Gaocheng 9411 serves as the female parent, ATHLET serves as the male parent, continuous selection is conducted through plant-to-row for generations, and the drought-resistant wheat strains JM205 and JM208 high in waxiness are created; Jimai 22 serves for backcrossing and conducts backcrossing with the drought-resistant wheat strains JM205 and JM208 high in waxiness respectively, six generations of BC6F-5 and BC6F1-8 strains are backcrossed for expanding propagation, waxiness of flag leaves is tested, testing and calculation of physiological indexes about drought resistance are conducted, and the wheat strains J-JM205 and J-JM208 which are high in waxiness, resistant to drought and high in yield are created. According to the breeding method for the new varieties of the drought-resistant wheat, conventional visual inspection conducted at the early stage of backcrossing and index testing conducted at the later stage are adopted, breeding cost is saved at the early stage, and accurate selection is conducted at the later stage.

Description

technical field [0001] The invention belongs to the field of genetic breeding, and in particular relates to a method for breeding new drought-resistant wheat varieties. Background technique [0002] Wheat is one of the most important food crops in the world, its yield is second only to rice and corn, and it is the third largest food crop in my country. Wheat is one of the most important food crops because it feeds 40% of the world's population and provides 20% of human energy and protein supply. [0003] my country is a country with relatively scarce water resources. Drought and water shortage seriously restrict the development of agricultural production. Wheat is the third largest food crop in my country, and it is also a crop that consumes a lot of water. Drought has a huge impact on wheat production. According to statistics, in 2006, drought in Australia caused a 46% reduction in wheat production (FAO, 2013); generally speaking, drought can cause a 10%-15% reduction in ...

AI Technical Summary

Problems solved by technology

Although molecular marker-assisted breeding has been practiced in some units, the workload is huge and the economic investment is large

Physiological indicators related to drought resistance are also the key to solving this problem. At present, some physiological indicators, such as proline content, drought susceptibility index and drought resistance index, have been initially applied in wheat stress-resistant assisted selection breeding, but it is costly. Human and material resources are still relatively large

There is no report on drought-resistant breeding of polywaxy drought-resistant strains

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