Method for purification, rejuvenation and new variety breeding of local variety of coix lacryma

Abstract

The invention discloses a method for purification, rejuvenation and new variety breeding of a local variety of coix lacryma. The method comprises the following steps: (1) selection of original species; (2) first year: seed selecting garden; (3) second year: family garden; (4) third year: identification and selection of the garden; (5) fourth year: yield monitoring garden; and (6) fifth year: seedexpanding propagation; by identification and selection as well as yield monitoring year by year, screen out purified and rejuvenated strains which are high in yield, compact in plant type, good in quality and strong in stress resistance. In addition, parent selection, hybridization, convergent cross or backcross is performed, or a local variety is bred to mutate the strains, heredity of the strains is identified to be stable, and a new variety of the coix lacryma can be cultivated. The speed and efficiency of the purification, rejuvenation and new variety breeding of the local variety of the coix lacryma can be improved, the genetic stability of the coix lacryma variety is guaranteed in production, and the quality and the stress resistance are obviously improved.

Description

technical field

[0001] The invention relates to the technical field of resource protection and breeding of Coix local varieties, in particular to a method for purifying and rejuvenating local Coix varieties and breeding new varieties. Background technique

[0002] Job's tears is a traditional economic crop with both medicine and food, which has extremely high nutritional value and important medicinal value. The seeds used in the main planting areas of Job's tears in my country are mainly farmers' self-retained seeds, which are single in variety, coupled with natural hybridization, mechanical mixing and adverse environmental effects, etc., and are vulnerable to diseases in production. After long-term planting, the variation and degradation of varieties, the deterioration of quality and high yield, the decline of stress resistance, especially the aggravation of diseases, thus limit the development of Coix industry. Therefore, the purification and rejuvenation of high-quality ...

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