Breeding and seed production methods of quality multi-resistant high-yield hybrid rice

Abstract

The invention discloses breeding and seed production methods of quality multi-resistant high-yield hybrid rice indica Zhen you 184. The rice bred through the method has good comprehensive yielding ability, moderate mature period, fine quality, good commercial value and strong stress resistance. The breeding method includes the steps of taking quality rice-blast-resistant sterile line Zhenxian 1A with high combining ability as the female parent to hybridize with quality bacterial-blight-resistant high-heterosis restorer line Zhen hui 084 to obtain hybrid rice indica Zhen you 184 with fine quality, strong rice blast resistance and bacterial blight resistance and high yield. The seed production method is as follows: seeding the male parent Zhen hui 084 in two periods, seeding the male parent in the I period at the end of April and then seeding the male parent in the II period 8-12 days later. The female parent is seeded 14-18 days after the male parent in the I period, the leaf age difference is about 3.0-3.5, the ratio of the rows of the male parent and the female parent in the seed field is 2:12-14, the male parent of the I period and the II period are in alternate single-plant transplantation, the row pitch of the female parent plants is 12-15cmX 16-19cm, and fewer-seedling transplanting is adopted. The seeds are isolated strictly, care is paid to remove the impurities, appropriate amount of '920' is sprayed through artificial supplementary pollination measure, and disease and insect control work is paid attention to.

Description

technical field [0001] The invention relates to a plant seed breeding and seed production method, more specifically to a high-quality, multi-resistant, high-yield hybrid rice Zhenxianyou 184 breeding and seed production method. Background technique [0002] Rice is the largest crop in my country. Hybrid indica rice has high yield, wide adaptability, and is easy to cultivate. The planting area accounts for 50% of the total rice area in the country, and the output accounts for 60% of the total rice output. It has made a great contribution to my country's grain production. The improvement of hybrid rice varieties has always been the key field of agricultural research in my country. High quality, multiple resistance and high yield are the long-term goals of hybrid rice breeding in my country. [0003] With the increase of population and the decrease of land, the food problem is still a social problem that cannot be ignored. In the past ten years, the breeding of hybrid rice in m...

AI Technical Summary

Problems solved by technology

[0003] With the increase of population and the decrease of land, the food problem is still a social problem that cannot be ignored. In the past ten years, the breeding of hybrid rice in my country has progressed rapidly, and a large number of new hybrid rice varieties have been bred and widely used in production. There is no major improvement, no resistance to bacterial blight and rice blast, no breakthrough in yield potential, easy to lodging, and a large distance from the requirements for the development of high-quality, high-yield, and efficient agriculture

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