544results about How to "Shorten breeding time" patented technology

The invention relates to a fast crossbreeding method of a pear tree, which comprises the steps of determining a male parent and a female parent, spraying lime sulfur once before the male parent pear tree sprouts, collecting pollens when blossom buds germinate, constructing a fly net to isolate when the self-incompatible female parent pear tree is at first squaring stage, using male parent pollen pollinating liquid to spray on the female parent to pollinate, when the flowers are faded, removing the fly net, picking the crossbred fruits, collecting seeds and hiding the seeds in sand, performingtray-soilless seedling, promoting seedling in a nutrition pot, compact planting and transplanting the seedling in a large land, so as to obtain a hybrid single plant; cutting off all lateral branchesat the lower part of the hybrid single plant, selecting a stock, selecting top branches of the hybrid single plant in autumn to perform stock bud grafting, complementarily grafting the branches in the next spring, pinching new tips and pulling branches, identifying fruit quality, cutting down the single plant with quality lower than medium, keeping the single plant with quality higher than medium, and performing other biological characters survey. In the method, the stock can be reused, so that the fruit portion is significantly lowered, the land resource is saved; a lot of manpower and materials can be saved; and the breeding time can be shortened by 3-4 years.

The present invention discloses a method for artificial breeding and rearing frog in pens. Said method includes the following steps: selecting seed, egg deposition, incubation, tadpole culture, rearing froglet and adult frog. Besides, said invention also provides the concrete requirements of every step.

The invention discloses a breeding method of a multi-resistance glutinous rice restoring line, belonging to the technical field of rice disease-resistance breeding, which comprises the following steps that: a three-line glutinous restoring line is taken as a recurrent parent, and is respectively hybridized with a rice blast resource-resisting parent-A, a rice bacterial leaf blight resource-resisting parent-B, a bacterial leaf steak resource-resisting parent-C and a banded sclerotial blight-D, by a synchronous back-cross aggregation method, the resource-resisting genes of the leading four ricediseases at present can be aggregated to a good three-line glutinous hybridized restoring line of the same genotypic milieu, and the bred multi-resistance glutinous rice restoring line can simultaneously and highly resist the four diseases, and has other agricultural and yield traits which are consistent with those of the original parent, so that the disease resistance of the three-line glutinoushybridized rice can be greatly improved. When the method is used for preparing the glutinous hybridized rice, the disease resistance of the glutinous hybridized rice can be greatly improved.