Hybridization method of wild paddy rice

Abstract

The invention discloses a hybridization method of wild paddy rice. A mature wild paddy rice hybridization technology is developed in the aspects of reasonably processing the different flowering phases of different materials, cautiously performing the castration operation, using different hybridization tools, controlling appropriate environmental conditions, identifying the hybridization and the like. The experiment proves that the success rate of the hybridization technology is high, more hybridized seeds can be obtained, the hybridization technology can be widely suitable for the hybridization requirements of different types of wild paddy rice and between the wild paddy rice and the cultivated paddy rice, the mining of genetic resources of the wild paddy rice can be facilitated, and contribution can be made to the diversified scientific research of the paddy rice.

Description

technical field [0001] The invention belongs to the field of hybrid breeding, and in particular relates to a method for hybridizing wild rice. Background technique [0002] Asian cultivated rice is one of the world's oldest crops and is the main source of food for nearly half the world's population. With the population boom and global climate change, people urgently need to constantly update the main varieties to meet the ever-changing and different needs. In the process of cultivating new varieties of crops, hybrid breeding, as the mainstream breeding method today, has developed a relatively complete technical route. It is hoped that hybrid offspring can not only inherit the superior agronomic traits of their parents, but also increase In terms of genetic differences among individuals, heterosis should be further applied to obtain better genetic breeding resources (Yuan Longping, 1997). In terms of basic scientific research, although new research methods using modern biote...

AI Technical Summary

Problems solved by technology

[0004] Although there are currently hybrid patents between cultivated rice and cultivated rice, and between cultivated rice and wild rice, there are large differences between wild rice and cultivated rice, which makes it impossible for many classical research methods in cultivated rice to mature. It is carried out smoothly in wild rice, and the differences related to hybridization are mainly reflected in the following points: a. Cultivated rice is mainly self-fertilized, while wild rice of different groups has different types of mating systems; b. Cultivated rice has small anthers and most of them The anthers of the varieties are less than 2mm, while the anthers of wild rice are large, some anthers can reach more than 6mm, and the amount of pollen is large, and the general method of killing males is difficult to be effective; c. The seeds of cultivated rice do not fall off after maturity, while the seeds of wild rice fall off after maturity; d .The flowering and pollination time of wild rice in different regions is not synchronized, which is slightly different from that of cultivated rice; e. The hybrid fertility of wild rice in different regions is unstable

It is these differences that make wild rice unsuitable for the hybridization method of cultivated rice, and the hybridization success rate is low

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