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

A technology for purifying and rejuvenating new varieties, applied in the directions of botanical equipment and methods, applications, and plant genetic improvement, it can solve the problems of rapid deterioration of varieties, single variety, and short production years, and achieve the improvement of stress resistance, the method is simple, the The effect of speeding up the breeding process

Active Publication Date: 2018-06-08
SUBTROPICAL CROPS INST OF GUIZHOU PROVINCE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for the purification and rejuvenation of local varieties of Coix and the selection of new varieties. The method is simple, efficient and the target traits can be inherited stably.

Method used

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

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Effect test

Embodiment 1

[0034] Coix variety Xingren Xiaobaike has not been selected by the four nurseries, and the thousand-grain weight has dropped significantly for three consecutive years, and the variety has been seriously degraded; the thousand-grain weight has been stable for three consecutive years after being selected by the four nurseries, the ear shape is consistent, and the yellowing property is good. It is suitable for production and use. Long term. See Table 1 for details.

[0035] Table 1. Yield and dry grain weight of Xingren Xiaobaike four nurseries before and after selection

[0036]

Embodiment 2

[0038] In 2014, the high-yielding glutinous parent Qianyiyi No. 2 was selected as the female parent and the high-yielding plant type, compact and disease-resistant Y113 was selected as the male parent to produce the F1 generation. The F2 generation established a large low-generation population. The F3 generation began to select single-plant families through four nurseries, and selected The goal is to harvest the families that meet the standards, and conduct identification of agronomic characters. And through the strict selfing of the F4 and F5 generations and the continuous selection of the four nurseries, the ideal traits were selected with directional targets in the F6-F8 generation, and the selfing was stable for one generation, and the panicle type was concentrated in the middle and upper part, the plant type was compact, and waxy. , high-yield, and strong disease-resistant strains, conduct a yield comparison test for each strain, and perform a strain comparison test on the...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 杨成龙付瑜华王健罗凯周明强蒙秋伊刘凡值杨小雨敖茂宏李志芳黎青班秀文周祥
Owner SUBTROPICAL CROPS INST OF GUIZHOU PROVINCE
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