A membrane covering and seed producing method of photo-thermo sensitive two-line hybrid wheat

Abstract

A method for preparing seeds of light temperature sensitive two line hybrid wheat is based on film covering, and is particularly related to a method for preparing seeds of light temperature sensitive two line hybrid wheat. Said method includes the following steps: 1) selecting the sterile line and restoring line and seeds preparing plot used for the preparing seeds of light temperature sensitive two line hybrid wheat; 2) covering a film; and 3) uncovering the film. The present method combines the two line hybrid wheat that used to be useless in the process of preparing seed, and makes it possible that the purity of the seed production is suitable to commercial production. For those combinations that take risk of preparing seeds due to the sterile lines unstable fertility, the risk can be reduced under present method, and the purity and the yield of the seed production of the two line hybrid wheat will be greatly improved.

Description

technical field [0001] The invention relates to a method for producing a film-covered seed of a two-line hybrid wheat, in particular to a method for producing a film-covered seed of a light-temperature-sensitive two-line hybrid wheat. Specifically, the present invention provides a film-covered seed production method for photothermosensitive two-line hybrid wheat by increasing the sterility of the sterile line at the seed production site, thereby improving the purity of the hybrid seed production and further increasing the yield of the seed production. Background technique [0002] Wheat is one of the main food crops in China and even in the world, and the utilization of wheat heterosis is an effective way to increase wheat yield. In the research on the utilization of heterosis in wheat, the utilization of nuclear-cytoplasmic interaction male sterility, that is, the three-line method, is progressing slowly due to the difficulty in recovery and other key issues that cannot be ...

AI Technical Summary

Problems solved by technology

As the latitude decreases, the sterility degree of the sterile line increases accordingly, but due to changes in plant height, flowering stage, maturity stage, and disease resistance caused by environmental differences, it brings great difficulties to seed production, and The further south the more difficult

Generally at the same latitude, as the altitude increases, the sterility of the CMS line increases, but generally due to the increase in altitude, the cultivation conditions become correspondingly worse, and some areas with slightly higher altitudes cannot grow wheat, such as mountainous areas close to plains

Generally speaking, the better seed production sites for winter CMS lines are plateau wheat areas with correspondingly lower latitudes and middle and high altitudes, but there are still changes in agronomic traits caused by environmental differences, which bring many problems to seed production. so difficult that it is impossible to produce seeds

Moreover, the fertility and fertility stability of the CMS may not necessarily reach a more ideal level.

[0006] In addition to the above-mentioned problems in long-distance off-site seed production, the distance cost increases, which increases the cost of seed production

Although our country has a large number of sources, since wheat is a crop with a strong ecological type, it is still difficult to choose an ideal seed production area to adjust the fertility of the sterile line only by climate changes between regions and altitude differences.