Breeding of barren-tolerant inbred lines using maize population suwan1

Abstract

The invention discloses a method for breeding barren-tolerant inbred lines using the maize population Suwan1. In the present invention, through the comprehensive means of improving the pedigree selection method, shuttle domestication and selection under different levels of dry land stress, a batch of inbred lines of barren-tolerant maize are formed by using the Suwan1C11 group, which improves the drought resistance and barrenness tolerance of the Suwan germplasm, especially the inventor The scheme based on the improved pedigree selection method of the present invention is compared with the inbred lines bred in the prior art for barren resistance, which can reach more than 40%), which broadens the germplasm base of corn in my country and solves the problem of the existing corn germplasm genetic basis The narrowness and lack of core technical issues of maize germplasm adapted to karst barren mountainous areas have laid the foundation for breeding maize hybrids adapted to karst barren mountainous areas in my country and even Southeast Asian and African countries.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a method for breeding barren-tolerant inbred lines using the corn population Suwan1. Background technique [0002] Corn is the world's largest food crop and has been called the king of feed. The development of corn production plays a vital role in ensuring food security and promoting the development of animal husbandry. [0003] my country's karst barren mountainous areas center on Guizhou Province, covering 193 counties (districts) in Yunnan, Sichuan, Chongqing, Hubei, and Hunan, including three national-level contiguous destitute areas in Wuling Mountains, Wumeng Mountains, and Yunnan, Guangxi, and Guizhou Rocky Desertification Areas The food and clothing of the poor is the most prominent social problem in this region. Corn is the ration crop with the largest planting area in this region. The perennial corn planting area is about 35 million mu, and the per unit yield is l...

AI Technical Summary

Problems solved by technology

[0006] my country's maize germplasm base is narrow, and most breeders have long relied on the four major germplasm resources (Tang Sipingtou, Lvda Honggu, Reid, Lancaster), which makes it difficult for the bred varieties to stand the test in the production of karst barren mountainous areas. However, there is no report on the use of Suwan1C11 populations to set up different grades of dry land for breeding research

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