Method for cultivating fine breed of hybrid rice by utilizing wild rice

A technology for hybrid rice and wild rice is applied in the field of cultivating improved hybrid rice varieties by using wild rice, which can solve the problems of poor stability of dominant plants, affecting the yield and quality of rice, and long process cycle, and achieves improved fruiting, large variation, and measures unique effect

Inactive Publication Date: 2014-06-04
TIANYANG HENGXING AGRI SCI & TECH
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Problems solved by technology

Therefore, the resistance of traditional wild rice and the hybridization of cultivated rice to breed new rice varieties take...

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  • Method for cultivating fine breed of hybrid rice by utilizing wild rice

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specific Embodiment approach

[0034] Utilize wild rice to cultivate hybrid rice improved varieties, the specific implementation method is as follows:

[0035] 1. Using IR58025B emasculation as the female parent to cross with wild rice to obtain purple stalk wild hybrid erect plant F 1 .

[0036] 2. Use IR58025B as the female parent and wild hybrid erect strain F 1 Pollination to obtain the purple stalk line F 2 , and cultivate the grain.

[0037] 3. Use IR58025B as the female parent and wild hybrid erect strain F 2 Pollination to obtain the purple stalk line F 3 , and cultivate the grain.

[0038] 4. Fill the container with sand, and then put the wild 3 The grains are sown evenly on the sandy soil, and the germination is accelerated according to the conventional method. When the grain buds grow to 0.5-1.5 cm long, the solar focus is used to radiate the base of the buds.

[0039] 5. Cultivate the first generation of grain seeds from the seed buds irradiated by the solar core.

[0040] (1) select the...

Embodiment 1

[0053] 1. Using IR58025B emasculation as the female parent to cross with Java wild rice to obtain purple stalk wild hybrid erect plant F 1 , plant height 130cm, with long awns.

[0054] 2. Use IR58025B emasculation as the female parent and Java wild hybrid erect strain F 1 Pollination to obtain the purple stalk line F 2 , plant height 110cm, with awns, and cultivated to have slender grains.

[0055] 3. Use IR58025B to castrate as the female parent and Java wild hybrid erect strain F 2 Pollination to obtain the purple stalk line F 3 , the plant height is 105cm, and it is cultivated to have slender grains.

[0056] 4. Fill the container with sand, and then put the wild 3 The grains are evenly sown on the sandy soil, and the germination is accelerated according to the conventional method. When the grain buds grow to the length of 1 grain to 1 grain, the solar focus is used to radiate its base.

[0057] 5. Cultivate the first generation of grain seeds from the seed buds irradi...

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Abstract

The invention relates to a method for cultivating a fine breed of hybrid rice by utilizing wild rice. The method includes the specific steps of: first, using a castrated IR58025B as a female parent and hybridizing the female parent with a wild rice to obtain an F1; then using a castrated IR58025B as a female parent and hybridizing the female parent with F1 to obtain an F2; then using the same method for hybrid to obtain an F3; then conducting germination on the F3 grains, using solar energy to carry out focus radiation on the bottoms of the grain sprouts, and breeding a radiation generation 1 seed-grain; selecting dominant plants from the radiation generation 1, and conducting continuous breeding to obtain a radiation generation 4 crossbred wild B, and selecting 35 plants; and carrying out 35 groups of paring hybrid by using IR58025A and the crossbred wild B, selecting close pairing in an A*B growth period, and mainly selecting B line plants with large column, strong vigor and early flowering; then respectively sowing the 35 groups of paring hybrid seeds, planting by germ lines, and conducting microscopic examination to find out 3 groups of aborted sterile germ lines; and finally carrying out separate nursery protection and nursery selection at the same time, and separately collecting and planting the seeds by groups, so as to finally obtain the strong dominant hybridized combination.

Description

technical field [0001] The invention relates to a new technology field of rice breeding, in particular to a method for cultivating improved hybrid rice varieties by using wild rice. technical background [0002] Because wild rice has been in the wild for a long time and has undergone natural selection of various adverse environments and disasters, they contain very rich excellent resistance genes. Mainly reflected in: wild rice contains a large number of excellent genes such as resistance to diseases and insect pests, drought resistance, cold resistance, high yield, high quality and high light efficiency, including resistance to diseases and insect pests (such as bacterial blight, rice blast, sheath blight, brown planthopper, White-backed planthopper, leafhopper, rice gall midge, yellow dwarf disease, common dwarf disease), stress resistance (cold tolerance, salt tolerance, drought tolerance, waterlogging tolerance) and other excellent traits (such as cytoplasmic male steril...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 周安岳周崎涛
Owner TIANYANG HENGXING AGRI SCI & TECH
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