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Screening method for breeding strong cold-resisting new rice variety

A screening method, a technology for new varieties, applied in the fields of botanical equipment and methods, applications, plant genetic improvement, etc.

Inactive Publication Date: 2003-04-23
江西省农业科学院水稻研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to combine the strong cold tolerance genetic characteristics of wild rice into cultivated rice by using the existing conventional breeding methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Using Dongxiang wild rice as the female parent and cultivated rice as the male parent, carry out sexual hybridization, plant F1 (hybrid first generation), harvest more than 3,000 seeds from the F1 plants, soak these seeds at room temperature for 48 hours, and place them in a constant temperature box. Broken chest to accelerate germination at 30°C, and then put the germinated seeds on the edge of the indoor window to grow. It is best to grow outdoors. When they grow to 2 leaves and 1 heart, put them in the refrigerator or biological incubator at 0°C for 48 hours. Take it out and put it at room temperature for 6 days to resume growth, transplant the live seedlings to the field, and after maturity, harvest and leave them to survive the winter at 0°C under natural conditions. Through overwintering and regenerative plants, the transplanting is concentrated in one place, and recrossing or backcrossing is carried out at the heading stage. After recross or backcross generations...

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PUM

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Abstract

The present invention discloses a screening method for breeding strong cold-resisting new rice cavity, it uses wile rice as female parent and uses cultured rice as male parent, and adopts the following steps: making sexual hybridization to obtain hybrid, planting to obtain seed, culturing said seed to grow two-leaves and one-heart, and making treatment for 48-72 hr. in refrigerator or biological culture box of -2- +1 deg.C, restoring for 5-10 days at normal temp. in the room, transplanting living seedling into field, after it is grown up and ripened, hibernating and screening at low temp. -5-+1 deg.C, using hibernated plant with regeneration capacity to make multiple hybridization or backcross, making its progeny undergo the indoor and outdoor low-temp. treatment and screen at -5 - +1 deg.C, making family selectino and obtaining said new variety.

Description

technical field [0001] The invention relates to a new method for screening and cultivating crops, in particular to a screening method for breeding new rice varieties with strong cold tolerance. Background technique [0002] Rice chilling injury is a worldwide problem, especially in Japan, South Korea, the United States and China. Low temperature chilling injury is one of the main factors that affect the high yield, stable yield and high quality of rice. It is not only the enemy that threatens rice production in the north, but also seriously affects the heading and flowering and filling of early rice seedlings and late rice in the south. my country loses rice every year due to low temperature chilling damage 3-5 billion kg. Practice has proved that the genetic improvement of cold resistance of rice varieties is the most economical and effective way to prevent chilling damage. Rice breeders in my country have been devoting themselves to the research of rice cold-resistant bre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 陈大洲肖叶青
Owner 江西省农业科学院水稻研究所
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