The invention discloses a breeding method capable of simultaneously improving the rice blast resistance of conventional japonica rice and a japonica two-line sterility line, and belongs to the technical field of breeding. According to the method, an indica rice-blast-resistant two-line sterility line serves as a donor parent of a rice-blast-resistant gene and a two-line male sterile gene, conventional japonica rice which is applied on a large scale in production serves as a receptor parent, by means of primary hybridization, tertiary hybridization, marker-assisted selection and other methods, final selection is conducted on a BC3F2 generation, fertile plants can be used for cultivating new rice-blast-resistant conventional japonica rice varieties, and sterile plants can be used for cultivating the rice-blast-resistant japonica two-line sterility line. According to the breeding method, two breeding result materials are obtained in a breeding means, and the breeding method has the advantages of being clear in breeding target, simple and remarkable in breeding effect, and greatly reduces manpower and financial investment in breeding.

Breeding method capable of simultaneously improving rice blast resistance of conventional japonica rice and japonica two-line sterility line

The invention relates to a high-maturing-rate salt-tolerant high-quality scent bare rice germplasm creation method, and belongs to the technical field of crop genetic breeding. The method is characterized in that the rice specific germplasm with salt-tolerant sst genes is utilized to be subjected to hybridization and multiple crossing with the scent rice germplasm with excellent comprehensive properties of high quality, disease resistance, high maturing rate and the like; through a series of genetic improvement and screening such as pedigree method selection, indoor and field salt-tolerance identification and scent property, the scent bare rice specific germplasm with high maturing rate and good salt tolerance and being suitable for the direct seeding production in the sea beach saline-alkali soil can be created.

High-maturing-rate salt-tolerant high-quality scent bare rice germplasm creation method

The invention relates to a breeding method of bare-body salt-resistant drought-enduring lodging-resistant two-line hybrid rice combination, and belongs to the technical field of crop genetic breedingThe method relates to the creation of salt-resistant (containing sst gene) bare-body and drought-enduring rice new germplasm (photo- and thermo-sensitive male sterile line and restorer line); the created two-line sterile line with the above property and restorer line are used for mass grouping; the high-yield salt-resistant drought-enduring lodging-resistant bare-body two-line hybrid rice novel combination is bred; the combination is suitable for direct seeding production in coastal mud flat saline-alkali land; the salt-resistant land utilization rate is effectively improved; important significance is realized on guaranteeing the China food production safety

Breeding method of bare-body salt-resistant drought-enduring lodging-resistant two-line hybrid rice combination

The invention relates to a breeding method of a salt-tolerant naked rice three-line sterile line, and belongs to the technical field of crop genetic breeding. The method involves breeding of the high-quality cytoplasmic male sterile line with moderate growth period, hairless (naked) leaves and salt tolerance (including an sst gene). A new combination of three-line hybrid rice with hairless (naked)leaves and salt tolerance (containing the sst gene) is expected to be screened out by combining the three-line sterile line with a large number of salt-tolerant restoring lines, and is expected to beplanted in coastal saline-alkaline mud flats.

Breeding method of salt-tolerant naked rice three-line sterile line

The invention discloses a method for increasing the disease-resistant breeding efficiency of hybrid rice, and belongs to the field of disease-resistant breeding of the hybrid rice. The method comprises the following steps: creating germplasm containing a bacterial blight resistance gene and rice blast resistance gene chromosome segment or a salt resistance gene and rice blast resistance gene chromosome segment by utilizing a molecular marker-assisted selection technology, and respectively hybridizing with a three-line maintainer line, a two-line sterile line or a restoring line; screening resistant individual plants for each segregative generation in a seedling stage by utilizing bacterial blight germs until screening out a new maintainer line B-resistant plant, a two-line sterile line S-resistant plant or a new restoring line R-resistant plant which obtains genetic stability and accords with breeding purposes; matching by using a sterile line containing the bacterial blight resistance gene and rice blast resistance gene chromosome segment and a restoring line containing the salt resistance gene and rice blast resistance gene chromosome segment, thus obtaining a hybrid variety containing the bacterial blight resistance gene, the rice blast resistance gene and the salt resistance gene. The method provided by the invention is simple and quick, and the disease-resistant breeding efficiency of the hybrid rice is increased.

Method for increasing disease-resistant breeding efficiency of hybrid rice

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Method for increasing disease-resistant breeding efficiency of hybrid rice