Simplified seed production method of small-grain hybrid rice and small-grain hybrid

Abstract

The invention discloses a simplified seed production method of small-grain hybrid rice and a small-grain hybrid seed. The simplified seed production method comprises the following steps: 1) cultivating strong seedlings by using Bing 4114 as a male parent; 2) directly sowing the small-grain sterile line Zhuo 201S serving as a female parent in a field, and throwing the male parent subjected to seedling strengthening in the step 1) into the field with the female parent; and 3) after maturity, harvesting the male parent and the female parent in a mixed manner, and screening and separating to obtain the small-grain hybrids. According to the simplified seed production method of the small-grain hybrid rice, disclosed by the invention, the Bing 4114 with high combining ability, strong disease resistance and homozygous genotype is selected as the male parent, and the small-grain sterile line Zhuo 201S with high stigma exsertion rate, good outcrossing characteristic and excellent agronomic traits is selected as the female parent for mixed sowing hybrid seed production; the high-yield, high-quality and disease-resistant rice small-grain hybrid seeds are obtained, male parents and female parents of the small-grain hybrid seeds are subjected to mixed sowing and mixed harvesting, male parent and female parent seed separation is achieved in combination with screening and separation, and therefore simplified seed production of the small-grain hybrid seeds is achieved.

Description

technical field [0001] The invention relates to the field of hybrid rice seed production, in particular to a light and simplified seed production method of small-grain hybrid rice. In addition, the present invention also relates to a small-grain hybrid rice obtained by the light and simplified seed production method of the above-mentioned small-grain hybrid rice. Background technique [0002] Hybrid rice seed production is an important guarantee for the large-scale promotion of hybrid rice. my country's hybrid rice seed production technology has matured as early as 1985. The early seed production was based on the three-line supporting system, using the sterile line and the restorer line for seed production. Later, with the development of the two-line technology, it developed The principle of the supporting two-line seed production technology is to use the cytoplasmic male sterile line as the female parent, plant it in rows with the male parent's restorer line in a certain pr...

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Problems solved by technology

[0005] The invention provides a light and simplified seed production method of small-grain hybrid rice and small-grain hybrid rice to solve the technical problems in the prior art that hybrid rice seed production costs are high and affect the popularization and application of hybrid rice

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