Method for breeding elite seed by distant hybridization of graminaceous plant

Abstract

The invention discloses a method for selecting elite seeds of a grass family by distant hybridization. The method mainly comprises the following steps: selecting a female parent and a male parent of the grass family which belong to the same species but different families and are in the same florescence; picking off staminate flowers of the female parent and hybridizing and selecting by pollen of the staminate flowers of the male parent containing protein of the female parent; then backcrossing for 2-3 times to obtain seeds with excellent characteristics of the male parent and the female parent finally. The method can be used for hybridization improvement of the characteristics of certain plants of the grass family by the excellent characteristics of the plants of other different families, thus obtaining a new variety with certain excellent characteristic that people desire. The method can help improve paddy rice into 'dry rice', thus realizing self-drought resistance of the paddy rice and easy plantation in an arid area.

Description

technical field [0001] The present invention relates to agricultural breeding methods. Background technique [0002] The agricultural breeding method related to the invention is a cross-breeding method. Traditional cross-breeding generally involves inbreeding between two grass plants of the same family and genus. Select excellent male and female plants, remove the stamens of the female parent, pollinate with the stamen pollen of the male parent, and obtain excellent varieties through several generations of hybridization. For example, rice and corn, which are widely promoted at present, are all bred by inbreeding. Although the method for distant hybridization of two kinds of grass plants of different genus has been found at present, the success rate is not high, and it is not easy to repeat, and has little significance in agricultural production. [0003] As we all know, rice is a crop that grows in paddy fields. It is not suitable for planting in dry fields. However, in no...

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Problems solved by technology

However, if hybridization is carried out between rice plants using the method of close hybridization, the "water" gene will never be separated, and the male parent of the drought resistance gene can only be found in distantly related grasses.

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