Method for creating male sterile line of sorghum

Abstract

The invention provides a method for creating a male sterile line of sorghum, 314B is taken as a female parent, 871300 is taken as male parent, a Ji 2055B is bred for years and generations; the Ji 2055B is then taken as a female parent and Ji 502B is taken as a male parent to hybrid to obtain a generation F1, the generation F1 is subjected to self-crossing to obtain a generation F2, the single plant of the generation F2 is subjected to self-crossing to obtain a generation F3; the generation F3 is taken as a female parent and is hybridized with a Ji-Jin long early B to obtain a generation F1, the generation F1 is subjected to self-crossing to obtain a generation F2, the single plant of the generation F2 is subjected to continuous self-crossing, and a short-straw narrow-leaf generation F4 isobtained after screening; the plant of the generation F4 continues to be chosen and is subjected to self-crossing to obtain a generation F5, meanwhile, the generation F4 and a sterile line Ji 2055A are subjected to test crossing to obtain a generation F1; the chosen plant of the generation F5 and the sterile plant of the generation F1 are subjected to backcrossing to obtain a generation BC1, meanwhile, the generation F5 is subjected to self-crossing to obtain a generation F6, a backcrossing generation BC4 and a self-crossing generation F9 are obtained after continuous self-crossing and backcrossing for multiple times, the female parent and the male parent are basically the same, a hybrid seed is tested with a restoring line, and the plant with good plant type, super short straw and high combining ability is named as Ji 2065A and Ji 2065B. The hybrid plant bred from the provided super short straw sterile line Ji 2065A is short, is high in uniformity, and is particularly suitable for mechanized production.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, and in particular relates to a method for creating male sterile lines of sorghum. Background technique [0002] Hybrid varieties are used in my country's sorghum production. Before the 1980s, high-stalk hybrid sorghum was used in production. While producing grain, the stalks were used as weaving framework materials; The production has shifted to medium-stalked high-yielding hybrids suitable for manual harvesting; with the rise in labor prices, production has gradually turned to mechanization, and there is an urgent need to cultivate short-stalked hybrids suitable for mechanization. And the height of the hybrid depends on the height of the parent, and the dwarf parent line must be cultivated first to cultivate the dwarf hybrid. However, it is difficult to aggregate complex quantitative traits through existing breeding methods, and it is difficult to select parent lines with good plant type...

AI Technical Summary

Problems solved by technology

However, it is difficult to aggregate complex quantitative traits through existing breeding methods, and it is difficult to select parental lines with good plant type, wide adaptability, and extra dwarf

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