A kind of seed production method of tobacco male sterile hybrid first generation seeds

Abstract

The invention provides an economical and efficient production method of a tobacco male sterile first generation hybrid seed. The method includes: at an altitude of less than 700 meters, under the climate conditions meeting the requirements of early vegetative growth and later reproductive growth of tobacco plants, conducting seedling culture on a maternal tobacco plant and a paternal tobacco plant separately, then employing isolation planting, performing topping on the maternal tobacco plant, then collecting paternal pollen and preparing pollination, during pollination, adding starch and blending them, adopting an artificial pollination pen or pollination gun to perform pollination, carrying out deblossoming on the maternal tobacco plant both before and after pollination, and when the capsule pericarp browning reaches more than 80%, conducting single fruit harvesting in batches and performing drying, then conducting threshing processing to obtain the male sterile first generation hybrid seed. The method provided in the invention has the advantages of reasonable design, low production investment, and high seed yield. On the basis of ensuring a variety purity (99%) and a seed germination rate (95%), maximization of a high-quality germplasm propagation coefficient is realized, the seed yield is greatly improved, and the seed production cost is decreased significantly.

Description

technical field [0001] The invention relates to a method for propagating crop seeds, in particular to an economical and efficient seed production method for tobacco male sterile hybrid first generation seeds. Background technique [0002] In the 1950s, my country had already carried out the utilization of tobacco heterosis and hybrid seed production. However, when it was popularized and applied in production, it did not last long due to the poor quality of the bred varieties and the high production cost of hybrid seed production. In the 1970s, after the introduction of the Burley tobacco male sterile variety MSB21 from the United States, the emasculation problem in hybrid seed production was solved, and the utilization of tobacco male sterile hybrids became active again (China Tobacco Cultivation. Shanghai Science and Technology Publishing Company; 1st edition, November 1, 2005). Up to now, a large number of new varieties of male sterile hybrids such as flue-cured tobacco, ...

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Problems solved by technology

[0002] In the 1950s, my country had already carried out the utilization of tobacco heterosis and hybrid seed production, but in the process of production promotion and application, due to the poor quality of the bred varieties and the high production cost of hybrid seed production, it did not last long.

In recent years, with the development of the rural economy and the increase of farmers' income, the traditional tobacco male sterile hybrid seed production has the following disadvantages: first, the rural labor force is small and pollinators are scarce; second, it is greatly affected by the weather, There is no standard for seed yield; the third is low pollination efficiency and low seed yield (4-6kg); the fourth is high production cost

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