Production method for core seeds and stock seeds of thermo-sensitive male sterile line 1S of flax

Abstract

The invention discloses a production method for core seeds and stock seeds of a thermo-sensitive male sterile line 1S of flax. The core seeds and stock seeds of the thermo-sensitive male sterile line 1S of the flax are produced by adopting a one-selection and three-field method, namely single plant selection, plant-to-row comparison, plant strain identification and mixed optimal line breeding. The production method disclosed by the invention has the beneficial effects that firstly, the typicality of the core seeds is guaranteed, inbreeding generations are reduced, and the genetic drift phenomenon is reduced; secondly, microscopic examination is finished by two stages, so the stability and the reliability of selected materials are improved; thirdly, the selection is realized under the condition of net isolation, and further the purity of the seeds is improved, and the varietal characteristics are retained; fourthly, the stability and the purity of varietal characteristics and sterility of the stock seeds are guaranteed. Proved by practical results, the purity of the stock seeds bred by using the method is over 99 percent; when the seeds are produced, the volatility of sterility is smaller.

Description

technical field [0001] The invention relates to the field of crop breeding, in particular to a method for propagating core seeds and original seeds of flax thermosensitive male sterile line 1S. Background technique [0002] Flax belongs to the annual herbaceous plant of Linaceae, which is an important fiber crop and oil crop. Utilizing heterosis is an extremely effective way to improve crop yield and quality, and it is also a common development trend of various crop breeding. The improvement of flax varieties is an important way to increase the yield and quality of flax, and to promote the development of flax production. With the improvement of production level and the wide application of existing resource materials, conventional breeding methods are becoming more and more difficult to meet the requirements of production development. [0003] Flax is a self-pollinating crop, and the male sterile line is the key to heterotic utilization. In 1921, Bateson and Cairdner ident...

AI Technical Summary

Problems solved by technology

The application practice of the temperature-sensitive CMS in flax also shows that if the breeding is carried out according to the general routine, the starting point temperature of the CMS population will change, and the fertility rate will increase, which will lead to an increase in the risk of fertility fluctuations in CMS production. Even cause the sterile line to eventually lose its utilization value

However, there are few studies on the CMS method of flax

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