The three-line maize hybrids are composed of three male inbred lines, male sterile maintainer lines, and male sterile restorer lines. They are called three-line maize hybrids.
The characteristics of the first and third line maize hybrids
The female parent of the system does not need to castrate by hand, saves time and labor, has low cost, high seed purity, high yield of hybrids, and has high utilization value in production.
Advantages of Second and Third Series Maize Hybrids
(a) High yield of hybrids. Conventional maize hybrids must be artificially emasculated, and only when their mothers bloom and loosen their tassels in a timely, clean, and thorough manner, can they obtain high-quality hybrid seeds. However, in reality, most of the farming systems are difficult to achieve. . Because of the impure seeds and low quality, the phenomenon of reducing production is common. The main reason for this is the lack of timely or incomplete production of the seedlings and the production of inferior seeds. The resulting seed disputes occur every year. The most effective measure to solve this problem is to cultivate and use three-line maize hybrids. The mother of this type of hybrids does not have pollen, and no artificial castration is required for the production of crops. The purity of seeds is guaranteed. Therefore, the yield of three-line maize hybrids is higher than that of common hybrids of the same type.
(b) High yield of seed production. When the conventional corn hybrids are artificially castrated, 2-3 leaves are often removed, which affects photosynthesis. Three-line corn planting, the male and female tassel no pollen, saving nutrients, has a significant effect on the increase in grain gain. Scientific experiments have shown that the three-line maize planting plots increase the yield by 7%-12% compared with the conventional maize-producing plots, and increase the yield by 15-30 kilograms per mu.
(c) Low production costs. In general, conventional maize hybrids need to be completed in about 7 days for artificial detasseling, requiring 2 workers per mu. Tertiary system farming does not require manual castration, saving emasculation work, and the larger the production area, the more significant the reduction in costs.
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