33results about How to "High exposure rate" patented technology

The invention discloses a breeding method of an insect-resistant big-stigma three-line sterile line, belonging to the technical field of rice insect-resistant breeding. The breeding method is characterized in that a three-line maintainer line B is taken as a recurrent parent, a chilo-suppressalis-resisting parent, a rice-planthopper-resisting parent and a big-stigma parent are subjected to hybridization, backcross and insect-resistant screening to polymerize big stigma, chilo-suppressalis-resisting and rice-planthopper-resisting genes in the three-line maintainer line B, and then the highly chilo-suppressalis-resisting and planthopper-resisting big-stigma three-line sterile line is formed through hybridization and backcross of the line B and a corresponding line A. The sterile line is highly resistant to rice planthopper and chilo suppressalis, is easy to expose because of large stigma of glumous flowers, and is high in exposure rate of the stigma, outcrossing maturing rate and seed production yield; and the seed production yield and the insect-resistant level of hybrid rice can be improved when the insect-resistant big-stigma three-line sterile line is used for preparing the hybrid rice.

The invention discloses a rice yield increasing soaking agent and an application method of the rice yield increasing soaking agent. The rice yield increasing soaking agent is characterized by comprising various functional compounds including cholesterol, potassium sulfate and sodium sulfate. The application method comprises the following steps of breeding raw materials through the rice seed and the rice yield increasing soaking agent according to a ratio; adding water to uniformly mix; standing for 7 to 15 hours under a dipping state; and finally processing the rice seed based on traditional steps of breeding and planting. According to the rice yield increasing soaking agent, the rice seed absorbs various functional compounds in the rice yield increasing soaking agent, so that the constitution and the activity can be greatly improved, and the anti-viral capacity can be improved; and the effects act throughout the whole growth period, the productive phase and the mature period. By adopting the rice yield increasing soaking agent, the tillering capacity of rice plants can be effectively improved in the growth period; the exposed spikes as well as the flowers can be increased during the productive phase, and the exposing rate of the stigma and the activity are also improved; and the spikes of the rice can be lengthened, densitied and fructified fully during the mature period, thus increasing the yield, generally speaking, by 10 to 30%. The rice yield increasing soaking agent is simple, and easy to use, is low in cost, and is suitable for various rice.

The present invention relates to a method for breeding a wide-compatibility indica-type sterile line with Dian-type cytoplasm. In the method, the maintainer material of japonica rice with wide-compatibility gene, dwarf stem, disease resistance and high-quality is selected as the female parent, and has been selected by indica-japonica hybridization. The middle indica, dwarf, and early-maturing maintainer materials are used as the male parent for crossing, and the F1 generation of the hybrid is backcrossed with the above male parent material; the ideal plant type of indica is selected in the middle generation after backcrossing, and the Dian type is used. In the Dian-type cytoplasmic transfer plots, select the plots with complete sterility or high sterility rate, and focus on the corresponding indica-type maintainer line materials that meet the breeding objectives. For the stable CMS materials, carry out test crossing at the recovery surface, select and match strong dominant hybrid rice combinations, and carry out plot propagation and seed production. The method has fast transfer speed and stability, and the obtained sterile line has wide recovery range, high seed reproduction and seed production yield, and good stress resistance.

The plant growth regulator for breeding rice hybrid consists of methoxone sodium 40-60 wt%, 2, 4-D 5-10 wt%, aspirin 5-30 wt% and starch 5-10 wt% mixed together. Into the plant growth regulator, triazolone in 35-40 wt% may be also added. The plant growth regulator has the functions of promoting the elongation of section below the ear of the sterile line, improving plant structure and ear structure, promoting the sterile line to bloom concentratively, raising the blooming period, etc. and thus can save the consumption of gibberellin, raise the hybrid bearing rate and increase hybrid yield.

The invention discloses a light and simplified seed production method for small-grain hybrid rice and a small-grain hybrid, comprising the following steps: 1) using Bing4114 as the male parent to cultivate strong seedlings; 2) using the small-grain sterile line Zhuo 201S For the female parent direct seeding in the field, while the male parent after the strong seedlings in step 1) is thrown into the field with the female parent; 3), after the maturation, the male parent and the female parent are mixed and harvested, and small-grain hybrids are obtained through screening and separation . The light and simplified seed production method of the small-grain hybrid rice of the present invention, by selecting B4114 with high combining ability, strong disease resistance and homozygous genotype as the male parent, has high stigma exposure rate, good outcrossing characteristics and excellent agronomic characters. The small-grain sterile line Zhuo 201S is a hybrid seed production of female parent mixed seeding, and a high-yield, high-quality, disease-resistant rice small-grained hybrid is obtained. The seeds are separated, so as to realize the light and simplified seed production of small-grain hybrids.

The invention discloses a preparation method and application of an iridium oxide nanoparticle catalyst. In the invention, a mixed solution comprising a polymer and an iridium-containing compound is uniformly coated on the treated conductive substrate, and then calcined in an air atmosphere to allow the When the iridium-containing compound is converted into iridium oxide, the polymer is decomposed, and the iridium oxide nanoparticle material with small particle size, amorphous and porous structure is obtained, and the polymer remaining on the iridium oxide nanoparticle material is removed by a plasma generator. , enriching the surface of iridium oxide nanoparticles with hydroxyl groups. The invention utilizes the thin film formed by the polymer in the mixed solution to solve the problem of agglomeration to form large particles when the iridium-containing compound is calcined to generate iridium oxide nanoparticles, thereby obtaining iridium oxide nanoparticles with small particle size. In addition, the present invention also uses a plasma generator to remove the polymer remaining in the calcination process, so as to increase the contact area of ​​the iridium oxide nanoparticles, thereby improving the catalytic efficiency of the iridium oxide nanoparticles.

The invention provides a method for breeding high-yielding hybrid rice that is not easy to shatter, the method comprising the following steps: taking the two-line male sterile line Guangzhan 63S that is easy to shatter as the female parent, and the difficult-threshing excellent self-fertile restorer line 5M303 as the father Originally, through hybridization, 5303S, a temperature-sensitive sterile line that is not easy to shatter, was bred through directional selection among the offspring. The resistance to seed shattering of the sterile line is dominant, and the hybrid F1 is not easy to shatter, so it can be used to produce female parents of hybrid rice and reduce yield loss in hybrid rice seed production. The excellent CMS varieties that are not easy to shatter cultivated by the present invention can effectively reduce rice shedding at maturity, the impact of bad weather and the loss of yield during harvesting, adapt to existing rice cultivation methods and mechanized harvesting, and reduce the cost of hybrid rice seed production , to increase farmers' income and ensure my country's food security.

The invention discloses a breeding method of a flax male sterility line with high stigma exertion rate and outcrossing rate. According to the breeding method, a thermo-sensitive recessive genic male sterile line is taken as the female parent, flax line with big stigmas and large stigma exertion rate is taken as the male parent, and hybridized combination is designed, wherein the stigmas of the male parent are obviously higher than anthers. Separated F2-F5 offsprings are subjected to stigma exertion property, sterility performance, and economical character selection; stable lines are subjected to ecological identification and outcrossing rate identification after F6; and the flax male sterility line with high stigma exertion rate and outcrossing rate is selected. The obtained novel sterile line possesses obviously exposed stigmas, capability on receiving foreign pollen and outcrossing seed-setting rate are improved substantially.