50results about How to "High pollen" patented technology

The invention discloses a method for breeding a corn inbred line by using the hybridizing induction of haploids, and belongs to the field of crop breeding methods. The method comprises the following steps: pollinating basic population or cenospecies according with breeding targets by using JASS31, and selecting aleurone layer top purple and purple-free embryonic tip labeled grains; naturally or artificially doubling the obtained material, and inbreding; and selecting non-separated head progeny rows realizing consistent progenies as a new inbred line. The method has a high haploid inductivity reaching above 13%, and has the advantages of obvious selection labeling, easy screening and high accuracy; and additionally, the JASS31 used in the invention has a moderate height, a long flowering time and a large pollen amount, and natural pollination induction of haploids can be carried out, so the artificial pollination can be avoided, labor saving is realized, and it is suitable for the large scale population operation. The method also has the characteristics of high breeding efficiency, simple operation and fast breeding speed.

The invention relates to a breeding method of crops, and particularly to a breeding method of broccolini, belonging to the technical field of plant breeding. The breeding method has the advantages that 1. the male sterility line belongs to cytoplasmic male sterility and maternal inheritance, and is stable in sterility, the sterile plant rate and the sterility are 100 percent, nectary is developed, more nectars grow, stigma is normal, flowering and fruiting characters are good, and a seedling does not yellow under the condition of low temperature and can not deteriorate after multi-generation backcross, transform is easy, growth is vigorous, and combining ability is strong; 2. a transformation early generation sterile line is stronger in growth vigor in comparison with a maintainer line and has the advantage of interspecies cross; 3. a later producing shoot of the transformation early generation sterile line is stronger than that of the maintainer line, and thus the transformation early generation sterile line material is early planted by 5 days in comparison with a backcross male parent; 4. F1 is prepared by using the sterile line, the seed yield is high, the seed producing cost is low and the labor is saved; and 5. a new variety prepared by using the sterile line is strong in disease resistance, and is remarkable in production increasing.

The invention discloses a method for selecting early-maturing yellow skin pepper germplasm and belongs to the technical field of plant breeding. Firstly, an ornamental pepper selfing population is subjected to sowing and seedling raising, and plants with viridescent cotyledon and euphylla are selected from the population in the cotyledon period and the euphylla period; in the flowering period, plants with about 10 initial flower sections, upward pedicels, milk white petals, faint yellow placentas, white styles and purple stripes on style tips are selected, and plants which do not conform to any of the features in the population continue to be removed; in the blooming period, each individual plant is covered with a nylon insect-proof mesh bag so that the plants can conduct selfing and fruiting, or selfing is conducted by means of artificial pollination; in the fruiting period, the colors of young fruits, commercially ripe fruits and physiologically ripe fruits are distinguished, individual plants with yellow young fruits and commercially ripe fruits and red physiologically ripe fruits are selected, and the fruits are harvested and seeds are obtained according to the individual plants; individual-plant selfing populations are sown respectively the next year, selection continues to be conducted according to the features, and if the plants in a certain individual-plant selfing population all conform to the features in all the periods, selection of homozygous early-maturing yellow skin pepper germplasm is completed; if the populations continue to be separated, selection continues to be conducted for 2-3 years according to the features.

A method for selectively culturing three lines of hybrid corn rice with ultra-strong dominance by distant hybridization between paddy rice and corn includes such steps as respective sexual hybridization of the sterile line of hybrid rice with the selfing line and recovery line of corn, and continuous respective backcross of the obtained first hybrid generation with the selfing line and recovery line of corn to obtain the sterile line, maintenance line and recovery line of corn rice, which have ultra-strong dominance, high resistance to stress and high yield.

The present invention relates to a restoring line breeding method of the barley combination hybridized by robust and high-quality ones; the method belongs to the technical field of agricultural crop breeding. The method comprises that the two-rowed barley restoring line is taken as the maternal plant and multi-rowed barley as the paternal plant; individual plants with scattered fringe and good flowering habit in the F2 generation to inbreed for 3 to 5 generations and get the restoring line 238; the restoring line 238 is taken as the maternal plant to hybridize with the multi-rowed barley 35 as the paternal plant; the offspring is backcrossed with the 35 paternal plant for 3 to 5 generations and get the flowering restoring line 03-358 with excellent agriculture features. The fringes of the restoring line 03-358 are scattered which is beneficial to long-term loose powder; the blossom is 2 to 3 days which is beneficial to adjusting the parent plants blossoms to meet; the anther is hung outside in blossom which is beneficial to hybridization. The parent 270A is taken as the maternal plant and the restoring line 03-358 is taken as the paternal plant; the combination is hybrid one of strong advantages; the hybrid F1 generation is two-rowed one; the largest fringe has 33 grains and the dry grain weight is about 45 grams; the stem is hard which is lodging resistant and the advantage of the hybrid is strong.

The invention discloses a breeding method of an excellent super sweet corn inbreeding line, and belongs to the technical field of agriculture new variety breeding. The breeding method is characterized in that a subtropical variety resource which is good in stress resistance, wide in applicability and good in quality is selected to carry out hybridization and backcross improvement with inbreeding super sweet corn, and strict selection is carried out on width, resistance, quality and the like of grains; excellent genetic genes sourcing from different source resources are gathered together, and richer sweet corn gene resources are provided for breeding. A super sweet corn inbreeding line 403-11A bred through the invention is semi compact in plant type, moderate in ear position, more tolerant in close planting and strong in heat resisting ability and cold resisting ability; higher general combining ability and specific combining ability effects are obtained, a prepared hybrid variety is high in yield, good in high temperature resistance and low temperature resistance, strong in rain resistance and wide in applicability, and a high-yield and stable-yield variety can be easily bred; the grains are relatively outstanding in quality, appearance properties, seed yield and the like, and the super sweet corn inbreeding line is good in comprehensive properties.

The invention discloses a production method of rice seeds. The method is characterized in that rice seeds produced by indica / japonica intermediate type restoring series R900 are adopted, wherein the indica / japonica intermediate type restoring series R900 are the intermediate materials which are prepared through wide spectrum and wide compability gene according to the high heterosis of indica / japonica subspecies; the intermediate materials are large in capacity, sufficient in source, high in ripening rate, and good in circularity; then the high pressure sieving is carried out to select multi-antibody seedling germplasm with polymerized indica / japonica stress resistance genes; the new rice spicy with high output, high quality and unified multi-antibody performances can be selected by rice inspection.

The invention relates to a breeding method of crops, and particularly to a breeding method of broccolini, belonging to the technical field of plant breeding. The breeding method has the advantages that 1. the male sterility line belongs to cytoplasmic male sterility and maternal inheritance, and is stable in sterility, the sterile plant rate and the sterility are 100 percent, nectary is developed, more nectars grow, stigma is normal, flowering and fruiting characters are good, and a seedling does not yellow under the condition of low temperature and can not deteriorate after multi-generation backcross, transform is easy, growth is vigorous, and combining ability is strong; 2. a transformation early generation sterile line is stronger in growth vigor in comparison with a maintainer line and has the advantage of interspecies cross; 3. a later producing shoot of the transformation early generation sterile line is stronger than that of the maintainer line, and thus the transformation early generation sterile line material is early planted by 5 days in comparison with a backcross male parent; 4. F1 is prepared by using the sterile line, the seed yield is high, the seed producing cost is low and the labor is saved; and 5. a new variety prepared by using the sterile line is strong in disease resistance, and is remarkable in production increasing.

The invention discloses a selection and breeding method for a color sweet-glutinous maize inbred line, and belongs to the field of maize breeding. The method comprises the following steps: (1) hybridization is performed by using a purple-glutinous maize seed as a female parent and a white-sweet maize seed as a male parent, and therefore an F1 generation is obtained; (2) purple seeds in the F1 generation are selected and planted, backcrossing is performed by using purple-glutinous maize seeds as male parents, and therefore an F2 generation is obtained; (3) purple-glutinous seeds are selected from the F2 generation, each seed is singly planted, bagging is performed on every grown maize for self breeding, and therefore an F3 generation is obtained; (4) ears with white-sweet seeds which appear in the F3 generation are selected, all purple-glutinous seeds on the ears are selected out and the selected seeds are separately singly sown, bagging is performed on every grown maize for self breeding, and therefore an F4 generation is obtained; and (5) white-sweet seeds in the F4 generation are selected and planted, and self breeding is continuously performed for 3-4 generations according to quality, resistance and plant types, so that the color sweet-glutinous maize inbred line is bred, and the inbred line can be used to breed stock seeds through self breeding or mixed breeding. Fruits of the color sweet-glutinous maize inbred line bred by the method are sweet and glutinous, and colourful in appearances.

The present invention discloses a method suitable for commercially inducing a corn haploid. The method comprises the following steps: carrying out hybridization of a corn haploid induction line I and a corn haploid induction line II to obtain a progeny recorded as an induction line hybrid, adopting the induction line hybrid as a male parent, carrying out hybridization of the induction line hybrid and a female parent material expected to obtain a haploid to harvest F0 hybridization kernel, and taking the haploid kernel to obtain the corn haploid, wherein the corn haploid induction line I and the corn haploid induction line II are different. Compared with the traditional method, the method of the present invention has the following characteristics that: on the basis of maintaining of a high induction rate, agronomy characteristics of the male parent (induction line hybridization combination) in the haploid induction is substantially increased, and especially a plant growth condition, a pollen disseminating amount, a pollen disseminating duration time, adaptability, resistance, and the like are substantially increased so as to improve haploid induction efficiency, provide a guarantee for efficient haploid induction, and provide possibility for large-scale haploid induction.

The invention relates to a breeding method for a sweet glutinous maize self-bred line, which comprises the following steps of: 1) hybridizing Nannongziyunuo No.1 serving as purple glutinous maize and Jingtian No.3 serving as ultra-sweet maize to obtain hybridized ears; 2) planting purple seeds, and backcrossing by using the Nannongziyunuo No.1 as a male parent to obtain backcrossed ears; 3) planting purple glutinous seeds, performing bagging selfing, namely selecting and remaining the ears of ultra-sweet seeds, picking all purple glutinous seeds of the ears out, and performing single-grain sowing and single-plant bagging selfing; and 4) selecting and remaining the ears of the ultra-sweet seeds, picking white ultra-sweet seeds of the ears, sowing, performing 3 to 4 generations of continuous selfing by combining stress resistance and quality characters and selecting excellent individual plants to breed a stable sweet glutinous maize self-bred line TN-01. By the breeding method, the advantages of high quality, high stress resistance and high adaptability of the bred hybrid seeds are ensured, and the bred self-bred line can hybridize the glutinous maize and the ultra-sweet maize.