30results about How to "Resistant to pests and diseases" patented technology

The invention provides a method for interspecific hybridization culture of a rose cultivar.A new rose species with excellent characters of parents is generated through hybridization of wild rose and traditional rose.The female parent line A is Rosa gugosa cv.plena, the male parent line B is Rosa multiflora thunb.Var.Albo-plena Yuet Ku, the offspring F1 with the comprehensive characters of the traditional rose line A as well as the target characters of the wild rose line B are cultured and screened through hybridization, F1 is subjected to selfing and purification, the flower color of generated plants is red mostly and white as minority, selfing of plants with white flower color is conducted, and a new generation of white hybridization rose cultivar which can bloom continuously, has both comprehensive characters and target characters and is stable is selected.

The invention discloses a method for cultivating a rose variety through interspecific hybridization. Wild rose is hybridized with traditional rose to generate a novel rose variety with good parent character. The female parent A is Rosa gugosa cv.plena, the male parent B is Rosa multiflora Thunb. Var. Albo-plena Yuet Ku, an offspring F1 with comprehensive characters of A series traditional rose and target characters of B series wild rose is obtained through hybridizing, cultivating and screening, F1 performs selfing purification, most of the plants grow red flowers, a few of plants grow white flowers, the plant with white flowers performs selfing, and the new generation of stable hybridized rose variety capable of flowering continuously and having comprehensive characters and target characters is selected.

The invention discloses a breeding method of green super-rice. The method comprises the following steps: (1) taking rice parents for hybridization, to obtain an F1 generation; (2) performing selfing and back-crossing to the F1 generation to obtain a F2 generation and a BC1F1 generation; (3) placing the F2 generation or the BC1F1 generation in a natural stress environment for breeding, and screening according to target characters to obtain target single plant; (4) repeating the steps (2) and (3) until the single plant with stable characters is obtained. According to the method, the conventional breeding method and a multi-factor natural stress environment are combined, rice is not subjected to stress screening of water irrigation, fertilizer application and pesticide spraying environments after being transplanted, high-yield, drought-resistant, low fertilizer-resistant (efficient utilization of the fertilizer) and disease and pest-resistant green super-rice can be obtained through matching the screening of target characters; and the rice material obtained by adopting the breeding method has the characteristics of being high-yield, drought-resistant, low fertilizer-resistant (efficient utilization of the fertilizer) and disease and pest-resistant, and the hereditary character is stable.

The invention provides a method of cultivating rose cultivars through distant backcross. The method comprises the following steps: rosa multiflora with cold resistance, drought resistance and saline-alkaline tolerance and traditional roses are hybridized through research, wherein a female parent A system is Rosa gugosacv. plena, a male parent B system is Rosa kokanica Regel ex juz.; an offspring F1 which has the comprehensive characters of the traditional rose of the female parent A system and the target characters of the rosa multiflora of the male parent B system is obtained by cultivation and screening after the hybridizing; the F1 is backcrossed with a recurrent parent A system for multiple times, the offspring of the F1 is self-crossed for purification, and a new generation stable hybrid rose variety, which has comprehensive characters and target characters and is capable of continuously flowering, is selected and obtained.