Breeding method for disease-resistant functional rice two-line sterile line

The invention discloses a breeding method of a three-line genic male sterile line of high-resistance glabrous yellow-leaf giant embryo rice and belongs to the technical field of breeding the special type rice. The method is characterized in that a yellow-leaf labeled parent, a drought resistant parent, a glabrous rice parent and a rice blast resistant parent are taken as cross parents and a giant embryo rice three-line maintainer line geB is taken as a recurrent parent, genes controlling the four traits including glabrous body, yellow leaf, drought resistance and rice blast resistance are pyramided in the giant embryo rice three-line maintainer line by use of a cross-backcross pyramiding method, and consequently, a giant embryo three-line maintainer line (yellow light resistant geB) which is highly consistent with the original giant embryo rice three-line maintainer line geB in agronomic and yield traits and has the characteristics of glabrous body, yellow leaf, drought resistance and rice blast resistance ca be bred, and moreover, the yellow light resistant geB is crossed and back-crossed with the corresponding giant embryo rice genic male sterile line by three generations, and as a result, the giant embryo three-line genic male sterile line (yellow light resistant geA) which has the characteristics of glabrous body, yellow leaf, drought resistance and rice blast resistance can be bred; and the yellow light resistant geA has the advantages of good resistance, high genetic male sterile line purity, easiness in harvesting and the like.

Breeding method of three-line genic male sterile line of high-resistance glabrous yellow-leaf giant embryo rice

The invention discloses a breeding method of a resistance-variable rice variety, belonging to the technical field of resistant-disease breeding of rice The breeding method comprises the following steps: respectively carrying out hybridization and back-crossing on a general rice variety which is relatively large in promotion area in production and good in quality or a restoring line as a recurrent parent with a stripe virus disease resisting parent, a chilo suppressalis resisting parent, a rice blast resisting parent, a dwarf disease resisting parent, a bacterial blight disease resisting parent, a bacterial leaf streak resisting parent and a banded sclerotial blight resisting parent, introducing anti-source genes of the seven main rice diseases and insect pests into excellent general rice or hybrid rice restoring lines in the same genetic background, breeding near-isogenic lines which have similar agronomic traits and yield traits with the recurrent parent and respectively have corresponding disease and insect pest resisting genes, and mixing in proportion to obtain the resistance-variable rice variety capable of widely resisting seven diseases and insect pests After being planted, the resistance-variable rice variety bred by the method disclosed by the invention has the characteristics of orderliness and nondisjunction in leaf form and the agronomic traits, and the resistance level to diseases and insect pests is also increased greatly

Breeding method of resistance-variable rice variety

The invention particularly relates to a breeding method for a multifunctional rice variety, belonging to the technical field of special rice breeding. The method comprises the following steps: selecting four rice varieties with high resistant starch content, low water-soluble protein content, high cellulose content and high vitamin A content as materials, and performing hybrid and multi-cross polymerization; measuring and screening the agronomic trait, yield trait, resistant starch content, water-soluble protein content, cellulose content, vitamin A content and the like of a segregative generation to breed the multifunctional rice variety with excellent agronomic trait and yield trait, high resistant starch content, high cellulose content, high vitamin A content and low water-soluble protein content. Rice produced by using the variety has the health functions of reducing blood sugar and blood fat and losing weight, is suitable for taking by patients with kidney diseases and diabetes, and has a very good nutritional health function on the type of patients.

Breeding method for multifunctional rice variety

The invention discloses a breeding method for edible high-quality ion-zinc-rich rice. The breeding method comprises the following steps: selecting red rice variety as a parent A, selecting zinc-rich rice variety as a parent B, and selecting glutinous rice variety as a parent C, using the parent A as the female parent, using the parent B as the male parent, hybridizing, and obtaining the first generation F1 of A/B; using the F1 as the female parent, using the parent C as the male parent, hybridizing, and obtaining the first generation F1 of A/B//C; selfing the F1, and obtaining the second generation F2; selfing the F2, performing the planting and harvesting according to the single plant, successively using the red rice, the glutinous property and the zinc-rich as the sieving indexes, and obtaining the third generation F3; performing the inbreeding of more generation to the F3, and obtaining the homozygous later generation with the red rice, glutinous property and zinc-rich characters; performing the inbreeding of more generation to the homozygous later generation, and obtaining the later generation with good agronomic characters; and performing the inbreeding of more generation to the later generation, breeding a strain with stable character, and obtaining the edible high-quality ion-zinc-rich rice. The cultivated rice variety belongs to the red rice variety, is edible in high quality and contains iron and zinc richly.

Breeding method for edible high-quality ion-zinc-rich rice

The invention discloses a method for breeding functional formula rice varieties, belonging to the technical field of special rice breeding. The method is characterized by comprising the following steps of selecting a rice variety with larger extending area and good quality in production as the recurrent parent, crossing the recurrent parent with black rice, purple rice, red rice, glutinous rice and giant embryo rice respectively, backcrossing the offsprings with the recurrent parent, breeding the near-isogenic lines which have agronomic traits similar to the agronomic traits of the recurrent parent and respectively have the traits of the black rice, purple rice, red rice, glutinous rice and giant embryo rice and mixing the seeds in proportion to prepare the seeds for production of the formula rice. The method has the following beneficial effects that after the formula rice varieties bred by the method are planted, the shapes of plants and leaves and the agronomic traits are neat and consistent; the rice obtained by grinding unhulled rice can simultaneously contain the five functional rice, namely the black rice, the purple rice, the red rice, the glutinous rice and the giant embryo rice; the functional formula rice can be produced by planting the seeds; the production method is simple and is high in efficiency and good in benefits; and the produced high nutrition functional formula rice integrates color, aroma, taste and nutrition curative effect and has good health care function.

Method for breeding functional formula rice varieties

The invention discloses a breeding method of a broad-resistance green soybean variety, and belongs to the technical field of soybean breeding for disease resistance. The breeding method comprises the following steps of hybridizing a high-yield and high-quality soybean variety with soybean varieties for highly resisting frogeye leaf spot, mosaic virus disease, downy mildew and cyst nematode disease; re-hybridizing filial generations two by two; evaluating and screening seed coat colors and disease resistance of multiple generations to breed the broad-resistance green soybean variety which can simultaneously resist four diseases and are excellent in other agricultural and yield characters. The variety has excellent agricultural and yield characters, and can resist the frogeye leaf spot, the mosaic virus disease, the downy mildew and the cyst nematode disease of soybean.

Li Meide

Papers

Method for breeding functional formula rice varieties

Breeding method of broad-resistance green soybean variety

Breeding method of three-line genic male sterile line of high-resistance glabrous yellow-leaf giant embryo rice

Breeding method of bare giant embryo red glutinous rice variety

Selective breeding method for high-nutrition rice varieties