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Method for fixing rice heterosis
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A technology of heterosis and rice, applied in rice cultivation, botany equipment and methods, greenhouse cultivation, etc.
Pending Publication Date: 2020-10-30
吴烽
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Problems solved by technology
[0005] The invention provides a method for fixing heterosis in rice to solve the problem that existing hybrid rice retains heterosis by continuously updating hybrid rice seeds
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Embodiment 1
[0029] The invention provides a method for fixing rice heterosis, the method comprising:
[0030] S101: Planting rice dominant hybrids.
[0031] S102: After the dominant hybrid of rice matures into rice, harvest the rice, and intercept the grasses of the rice.
[0032] S103: Cover the stalks with a greenhouse, and make the temperature in the greenhouse higher than 0°C.
[0033] S104: Prepare the soil after tillering, and use the tilled straw to transplant seedlings to cultivate the first generation of hybrids.
[0034] S105: After the first generation of hybrids matured, the grass stalks continued to be intercepted, and the grass stalks were planted as seeds until the dominance of the grass stalks degenerated.
Embodiment 2
[0036] The invention provides a method for fixing rice heterosis, the method comprising:
[0037]S201: Select the female parent and the male parent with excellent rice traits; cultivate the female parent and the male parent in separate spaces; soak the stamens of the female parent in warm water at 45°C during the flowering period, and the female parent's pistils are given to the pollen in the male parent's stamens After the pollen is granted, the mature rice of the female parent is the dominant hybrid of rice, and the dominant hybrid of rice is planted.
[0038] S202: After the rice dominant hybrid matures into rice, when harvesting the rice, the latent buds below 5 cm of the grass are harvested or reserved.
[0039] S203: Cover the stalks with a greenhouse, and make the temperature in the greenhouse higher than 0°C.
[0040] S204: During the tillering period, keep the temperature in the greenhouse at 12-30°C, keep the soil moist, and fertilize appropriately; when the tempera...
Embodiment 3
[0043] The invention provides a method for fixing rice heterosis, the method comprising:
[0044] S301: Select the female parent and the male parent with excellent rice traits; cultivate the female parent and the male parent in separate spaces; soak the stamens of the female parent in warm water at 45°C during the flowering period, and the pistils of the female parent are given to the pollen in the stamens of the male parent After the pollen is granted, the mature rice of the female parent is the dominant hybrid of rice, and the dominant hybrid of rice is planted.
[0045] S302: After the rice dominant hybrid matures into rice, when harvesting the rice, the latent buds below 5 cm of the grass are harvested or reserved.
[0046] S303: Use a cotton seedling transplanter to transplant straws at a density of 800-1200 bushes / mu, cover the transplanted straws with a greenhouse, and make the temperature in the greenhouse higher than 0°C.
[0047] S304: During the tillering period, k...
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Abstract
The invention provides a method for fixing rice heterosis. After hybrids with heterosis are ripened, roots and stems of rice are intercepted when the rice is harvested. The roots and stems can retainthe heterosis in the hybrids. The roots and stems are subject to heat preservation, planting and tillering. The tillered seedlings from the roots and stems of rice are planted according to a conventional method of rice planting until the seedlings are ripened. The mature seedlings are the first generation of the hybrids. The roots and stems are persistently kept after the first generation of hybrids are ripened and harvested, and the roots and stems still retain the heterosis in the hybrids. The roots and stems are continuously kept as germplasm and tillered into seedlings again until the roots and stems have no heterosis as the germplasm. According to the method for fixing rice heterosis provided by the invention, the roots and stems of rice are used for raising rice seedlings, thereby effectively retaining heterosis in original heterotic hybrids, and achieving early seedling and strong seedlings. The method of the present invention facilitates to form a high-yield seedling frame earlier and improve the yield and quality of rice. Seeds are not used for raising rice seedlings, thereby saving production cost, reducing overstocked seeds and improving economic benefits.
Description
technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for fixing rice heterosis. Background technique [0002] Rice is one of the main food crops in my country. There are various varieties of rice, which can be divided into indica rice, japonica rice, early rice, middle and late rice, glutinous rice and non-glutinous rice. According to the different types of rice, the rice produced by rice can be used not only for food, but also for wine making, sugar refining, and as industrial raw materials. Rice breeding is particularly important due to the wide range of uses for rice products. In the 1960s, the transformation of rice from tall stalks to short stalks has been realized, which has greatly increased the yield of food crops. People attribute the achievements of breeding in this historical period to the first "green revolution". [0003] With the development of the rice planting industry, hybrid rice has gradually b...
Claims
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Application Information
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