Accelerant for glume opening of photo-thermo-sensitive genic male sterile rice line under high-temperature stress and preparing method and application of accelerant

Abstract

The invention provides an accelerant for glume opening of a photo-thermo-sensitive genic male sterile rice line under high-temperature stress and a preparing method of the accelerant. The accelerant is prepared from citric acid, ethyl alcohol and a plant growth regulating substance, namely, jasmonic acid methyl ester, the three substances have the supplementary effect after being prepared into a solution, the solution is sprayed in the heading stage and can effectively promote glume opening of the photo-thermo-sensitive genic male sterile rice line under high-temperature stress, and the setting percentage and the seed yield after hybridization of the photo-thermo-sensitive genic male sterile rice line and a restoring line are increased.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to an accelerator for flowering of rice photothermosensitive male sterile lines under high temperature stress, a preparation method and application thereof. Background technique [0002] The establishment of two-line hybrid rice breeding theory and technology is a major innovation in rice hybrid breeding in my country (Lu Xinggui et al., 2001; Yuan Longping, 2002). At present, the annual planting area of ​​two-line hybrid rice in my country has exceeded 5 million hectares, which has played an important role in rice production and food security in my country (Shu Zhifen et al., 2016). The core content of two-line hybrid rice breeding is the use of rice photothermosensitive genetic male sterile line. Under specific light and temperature conditions, the photothermosensitive genic male sterile line of rice can realize the transition from nuclear male sterility to fertility. Ther...

AI Technical Summary

Problems solved by technology

Under high temperature, the photothermosensitive genic male sterile line of rice cannot bloom normally, which is a major obstacle for the hybrid seed production of the photothermosensitive genic male sterile line and the restorer line, which seriously reduces the seed setting rate and seed yield

However, there is still no method that can effectively promote the flowering of rice photothermosensitive GMS lines under high temperature stress.

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