1618 results about "Hybrid seed" patented technology

The present invention provides a method of herbicide treatment of selected female and male parents in a hybrid seed production system. The system results in enhanced trait purity and efficiency in the hybrid seed production system.

A process is described for producing hybrid seed using male-sterile plants created by employing molecular techniques to manipulate antisense DNA and other genes that are capable of controlling the production of fertile pollen in plants. Transformation techniques are used to introduce constructs containing antisense DNA and other genes into plants. Said plants are functionally male-sterile and are useful for the production of hybrid seed by the crossing of said male-sterile plants with pollen from male-fertile plants. Hybrid seed production is simplified and improved by this invention and can be extended to plant crop species for which commercially acceptable hybrid seed production methods are not currently available.

The invention relates to the technical field of side slope treatment, and discloses a high and steep side slope ecological retrieved green spray-seeding base material and a preparation method and application of the base material. The spray-seeding base material comprises the following raw materials in parts by weight: 330-420 parts of planting soil, 20-30 parts of peat soil, 1.5-5 parts of organic fertilizer, 1-3 parts of grass fibers, 1-3 parts of sawdust, 0.03-0.05 part of a water-retaining agent, 0.02-0.04 part of an adhesive, 0.1-0.5 part of inorganic fertilizer, 0.5-2 parts of a pH adjustment agent, 30-44 parts of hybrid seeds and 150-200 parts of water, wherein the hybrid seeds consists of the following plant seeds in parts by weight: 10-12 parts of rhizomes tall fescue, 2-4 parts of trifolium repens, 3-5 parts of alfalfa, 2-3 parts of bermuda grass, 2.5-4 parts of indigofera pseudotinctoria, 4-6 parts of magnolia multiflora, 3-5 parts of cassia corymbosa, 2-3 parts of amorpha fruticosa and 1-2 parts of coreopsis. The base material disclosed by the invention for spray-seeding can make a soil replacement base layer with the intensity higher than 0.25MPa; after 45 days when a turf is formed, the rainwash strength is higher than or equal to 120mm/h; within half a year to a year, an ecological plant colony with shrubs which grow with the rainwash strength higher than or equal to 200mm/h and serve as main plants is formed.

According to the invention, there is provided a hybrid maize plant, designated as 36K67, produced by crossing two Pioneer Hi-Bred International, Inc. proprietary inbred maize lines. This invention relates to the hybrid seed 36K67, the hybrid plant produced from the seed, and variants, mutants, and trivial modifications of hybrid 36K67. This invention also relates to methods for producing a maize plant containing in its genetic material one or more transgenes and to the transgenic maize plants produced by those methods. This invention further relates to methods for producing maize lines derived from hybrid maize line 36K67 and to the maize lines derived by the use of those methods.

The invention relates to a method for cross breeding and seedling propagation of paphiopedilum, which comprises the steps of artificial pollination, sterile seeding, strong seedling culture, and test-tube plantlet transplant. After the artificial pollination of paphiopedilum coenospecies, a powdery embryo in hybrid fruits is inoculated to a specially prepared seed germination culture medium for culture; plantlets obtained by the sterile seeding are inoculated to a specially prepared strong seedling culture medium for strong seedling culture; and finally, the test-tube plantlet transplant is performed. The method uses unique culture media, ensures the high germination rate, quick seedling and high seedling quality of paphiopedilum hybrid seeds, has the advantages of high operability, high application value and the like, and overcomes the difficulty that the paphiopedilum hybrid seeds are extremely difficult to germinate in a natural state due to the incomplete development of embryo and other difficulties.

The invention discloses a 'three-selection, two-advancing and one-promotion' apple breeding method. The apple breeding method provided by the invention comprises the following steps of: (1) pollinating a castrated apple variety with excellent comprehensive characters by pollen of Xinjiang red-pulp apples, to obtain hybrid seeds; (2) stacking the hybrid seeds, and then sowing in a greenhouse for growing seedlings after breaking dormancy; (3) transplanting the seedlings to a big field, and selecting red-pulp and crisp-pulp seedlings from the seedlings at an early stage of apples; (4) respectively pollinating the castrated apple varieties with excellent comprehensive characters by pollen of each red-pulp and crisp-pulp seedling, to obtain backcross seeds; (5) stacking the backcross seeds, sowing in a greenhouse for growing seedlings after breaking dormancy, and weeding out individual plants with green leaves and reserving individual plants with red leaves at a seedling stage; and (6) transplanting the individual plants of the seedlings to the big field. Three new varieties have been selected from 2006 to 2013. At least 20-30 years are needed if a traditional method is used.

The invention belongs to the technical field of crop cultivation, and particularly relates to a cassava blossoming regulation and control technology. The cassava blossoming regulation and control technology is characterized by comprising selection and preparation of land, plantation management, regulation and control of the blooming period, flower retention, regulation and control of the ratio of female flowers to male flowers, measurement of the pollen activity, pollination experiment and cross breeding. Stable and superior hybrid seeds are obtained by adopting a chemical regulation and control method and a manual agricultural measure regulation and control method. The cassava blossoming regulation and control technology has the characteristics of early blossoming time, high blossoming rate and easiness in technical operation, and is suitable for cross breeding in most cassava planting areas in China.

The present invention relates to isolated male tissue-preferred regulatory sequences from Ms45 gene. The invention also relates to the use of Ms45 gene male tissue-preferred regulatory sequences in mediating male fertility in a plant, and in producing hybrid seed. The Ms45 male tissue-preferred regulatory region can be operably linked to exogenous genes encoding cytotoxins or inhibitory molecules. The invention also relates to plant cells, plant tissue and plants that contain the MS45 gene regulatory sequences.

According to the invention, there is provided a hybrid maize plant, designated as 38H67, produced by crossing two Pioneer Hi-Bred International, Inc. proprietary inbred maize lines. This invention relates to the hybrid seed 38H67, the hybrid plant produced from the seed, and variants, mutants, and trivial modifications of hybrid 38H67. This invention also relates to methods for producing a maize plant containing in its genetic material one or more transgenes and to the transgenic maize plants produced by those methods. This invention further relates to methods for producing maize lines derived from hybrid maize line 38H67 and to the maize lines derived by the use of those methods.

The present invention discloses a pipless fructus momordicae and the cultivation method. The cultivation method is: 1) breeding the tissue cultivation seedling with the male and the female ex-plant of diploid fructus momordicae; 2) doubly introducing the chromosome with the tissue-cultivation successive-transfer seedling; 3) performing the differential cultivation with different parts of the male and the female plants after introducing treatment; 4) cutting the stem tip and the stem section of the sprout differentially cultivated to perform the gemmulation cultivation; 5) examining the number of the chromosome of a cultivated entire plant to select the tetraploid plant for performing the root cultivation and the seedling exercise; 6) planting the tetraploid plant and the diploid plant according to the conventional techniques and performing the artificial pollination to get the hybrid seed when in flower; 7) breeding the hybrid seed to be a complete plant and examining the number of the chromosome; selecting the triploid plant to perform the root cultivation and seedling exercise; 8) planting the triploid plant and the diploid plant and performing the artificial pollination on the male diploid plant with the female triploid plant when in flower; the pipless fructus momordicae can be obtained after the fruiting of the female plant.