Breeding method for eurytopic and new corn species with good quality and high yield

Abstract

The invention discloses a breeding method for a eurytopic and new corn species with good quality and high yield. Concretely, the corn strain 7239 and CML285 are hybridized, and seeds of S1 generation are obtained. After selfing of optimized strains, the corn strain gui 39722 is obtained. At the same time, after selfing of optimized strains of the corn strain Swan (late) C4, the corn strain guizhao 18421 is obtained. The Gui 39722 as a female parent and Guizhao 18421 as a male parent are hybridized, and the eurytopic and new corn species guidan 0810 with good quality and high yield is obtained. The breeding method is characterized in that the male parent and the female parent have good characters and high cooperation; the obtained guidan 0810 has high yield, strong resistance, good quality and wide adaptability; the obtained guidan 0810 is especially suitable for planting in the whole Guangxi, and also suitable for planting within certain realms of South China, Southwest China and some nations in Southeast Asia.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, and in particular relates to a breeding method for a high-quality, high-yield and widely suitable new variety of maize. Background technique [0002] Corn is an important crop in the world, and its total output is second only to wheat, ranking second. Corn has risen to become the largest food crop in my country and has an important strategic position in food security. Leading and supporting the development of my country's modern corn industry is the fundamental task of the scientific and technological progress of the national corn industry technology system. [0003] The application of maize hybrids in production is one of the important means to increase maize yield. Since East and Shul discovered the phenomenon of maize self-fertilization depression and hybrid vigor in 1908-1909, it has aroused great interest of scientists. The first corn hybrid (three-cross) was commercialized and utiliz...

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Problems solved by technology

[0004] At present, the existing corn varieties in my country cannot meet the production needs, mainly including the varieties with poor stress resistance, unsuitable variety traits, unsuitable seed quality, and difficult to adapt to the requirements of corn production mechanization

The development of the corn seed industry is relatively backward, and the situation is particularly severe. Although there are a large number of domestic corn varieties, the level of original inbred lines is low. Compared with some foreign dominant varieties, most domestic corn varieties are not suitable for close planting and mechanized operations. The germination potential of seeds is low, and foreign seeds are forced to withdraw domestic seeds, crowding out the domestic seed market, weakening my country's breeding advantages, and seriously threatening food security

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