Breeding method of a curly-leaf sesame inbred line

Abstract

The invention discloses a breeding method of a curly-leaf sesame inbred line. The breeding method comprises the following steps: 1) with white sesame Ezhi No.4 as a female parent and CLSU-9*J972 as a male parent, breeding a hybrid combination F1; 2) selfing F1 hybrid seeds to obtain F2; 3) with a curly-leaf plant in an F2 population as a female parent, crossing with a non-curly-leaf sister plant or an improved variety in the same family to obtain a hybrid F1; 4) with the hybrid F1 as a female parent, crossing with a non-curly-leaf sister plant in the same family to obtain a sister cross F1, or backcrossing with the improved variety to obtain BC1F1 seeds; 5) selecting a curly-leaf plant from the sister cross F1 or the BC1F1 generation for performing sister crossing or backcrossing to reserve seeds; 6) performing 3-5 generations of sister crossing or backcrossing to obtain the curly-leaf sesame inbred line after homozygosis. By the breeding method, a new breeding way for establishing germplasm resources of curly-leaf sesame is provided; curly-leaf leaves are fat and tender, are high in biological yield and can be used as vegetables, so that compared with the conventional variety, the curly-leaf sesame inbred line has obvious advantages, and thus can be popularized and applied in breeding and production.

Description

technical field [0001] The invention belongs to the technical field of plant breeding, and in particular relates to a method for breeding curly-leaf sesame inbred lines. Background technique [0002] Sesame is one of the main oil crops in my country. Sesame oil has pure aroma and high nutritional value, and is known as the "king of oils". The annual planting area of ​​sesame in my country is about 600,000 hectares, accounting for one tenth of the world's total area, with a total output of 600,000-700,000 tons, accounting for a quarter of the world's total output, and its total output and per unit area rank first in the world (Yang Mei , Huang Fenghong. China's sesame industry status quo and existing problems, development trends and countermeasures. China Oils, 2009, 34(1): 7-12), is a dominant crop for agricultural structure adjustment, and is also a traditional foreign exchange earning crop for export. However, in the past ten years, domestic sesame consumption has risen sh...

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Problems solved by technology

The main problems in the development of my country's sesame industry are: ①The output is often low and unstable, hovering at the level of 70 kg per mu for a long time (Yang Mei, Huang Fenghong. The current situation and existing problems, development trends and countermeasures of China's sesame industry. China Oil , 2009, 34(1):7-12); ② Poor disease resistance, prone to stem point blight and Fusarium wilt, and no immune or highly resistant materials have been found so far (Zhang X R, Zhao Y Z, Cheng Y, Feng X F, et al.Establishment of sesame germplasm corecollection in China.Genetic Resources and Crop Evolution,2000,47:273-279); ③The appearance quality is poor, the product consistency is not good, the oil content is low, and the market competitiveness is not strong

So far, there has been no public report on the method of innovating curly leaf germplasm resources by hybrid backcrossing

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