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A kind of breeding method of saline-alkali-tolerant sweet potato varieties

A salt-alkali-tolerant and sweet potato technology is applied in the field of breeding of salt-alkali-tolerant sweetpotato varieties, which can solve the problems of large number of hybrid individual plant populations, less attention to parental salt-alkali-tolerant, and salt-alkali-tolerant sweetpotato single plant elimination, etc. The effect of reducing the selected single plant, less blindness, and high accuracy

Active Publication Date: 2017-11-07
CROP RES INST SHANDONG ACAD OF AGRI SCI
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

The deficiencies in the traditional saline-alkali-tolerant sweet potato crossbreeding method are: 1. Pay more attention to the yield level, quality traits and disease resistance of the father and mother when matching the hybrid combination, and pay less attention to the saline-alkali tolerance of the parents; 2. The number of F1 generation hybrid single plants screened out according to the yield level and quality traits is relatively large, and more manpower and material resources are required for field identification, and it will take 3-5 years to complete the follow-up yield, quality, disease resistance, and tolerance. Therefore, the traditional breeding program has a large workload, long breeding period and high cost, and the early generation of breeding did not carry out the identification of salt-alkali tolerance, resulting in a large number of saline-alkali-tolerant sweet potato plants may be in the first Eliminated in round of screening

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Breeding process

[0030] (1) Hybrid combination configuration

[0031] Hybrid combination 1: Sushu 7, a variety resistant to 0.3-0.5% (mass concentration, the same below) saline-alkali, was used as the female parent, and Xushu 781, whose fresh potato yield exceeded Xushu 18 and its starch content was higher than 20%, was used as the father This, directed pollination, obtained 2000 F1 generation hybrid seeds through sexual crossing;

[0032] Hybrid combination 2: 1100 hybrid seeds of the F1 generation were obtained by sexual crossing with Lushu 8, which has excellent comprehensive traits and is not tolerant to salt and alkali, as the female parent, and Tainong 69, which is not tolerant to saline and alkali, as the male parent.

[0033] (2) Screening of F1 salt-tolerant sweet potato plants

[0034] Sow 2000 hybrid seeds obtained from hybrid combination 1 in the vermiculite powder in the greenhouse, strengthen management after emergence, topping to promote branch gro...

Embodiment 2

[0052] 1. Breeding process

[0053] (1) Hybrid combination configuration

[0054] Hybrid combination 1: the female parent is the 0.3-0.5% saline-alkali-tolerant variety Xu 03-31-15, and the saline-alkali-tolerant variety Jishu 21, which has a higher fresh potato yield than Xushu 18 and a starch content higher than 20%, is the male parent. 2200 F1 generation hybrids were obtained through sexual crossing.

[0055] Hybridization combination 2: 1950 hybrid seeds of the F1 generation were obtained by sexual crossing with the salt-intolerant Jishu 22 as the female parent and the saline-intolerant Shangshu 19 as the male parent.

[0056] (2) Screening of F1 generation saline-alkali-tolerant sweet potato plants

[0057] Sow 2,200 F1 generation seed seeds obtained from hybrid combination 1 in the vermiculite powder in the greenhouse, strengthen management after emergence, topping to promote the growth of branches, and select 1,700 healthy and healthy plants, and cut 4 from each indiv...

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Abstract

The invention relates to a method for breeding saline-alkali-tolerant sweet potato varieties, belonging to the technical field of hybrid breeding. The breeding method of the present invention comprises the steps of obtaining F1 generation hybrid seeds by directional hybridization or group hybridization, carrying out salt tolerance screening and identification, rapid breeding and breeding. The present invention adopts the method of directional hybridization or group hybridization to obtain the F1 generation seed, and the probability of producing salt-tolerant varieties in the offspring is greatly increased; the screening and identification of salt-tolerant sweet potato strains is brought to the first round (overcoming technical prejudice: the first round is carried out according to the yield and quality level) Round screening), which not only ensures the maximum selection of saline-alkali-resistant individual plants in the hybrid offspring, but also eliminates the materials that are not resistant to saline-alkali, which greatly reduces the number of selected individual plants, significantly reduces the workload of field identification, and can complete multi-site in different places at one time. Yield comparison test, the breeding period was shortened by 2-3 years. In addition, the method of the present invention also has the characteristics of high accuracy, low blindness and high efficiency.

Description

technical field [0001] The invention relates to a method for breeding saline-alkali-tolerant sweet potato varieties, belonging to the technical field of hybrid breeding. Background technique [0002] my country's saline-alkali land is mainly distributed in 17 provinces including Northwest, Northeast, North China and coastal areas, with a total area of ​​more than 500 million mu. The area of ​​saline-alkali wasteland and saline-alkali barrier cultivated land with potential for agricultural use is nearly 200 million mu, and the area of ​​saline-alkali land that can be used for agriculture in the near future reaches 100 million mu, with huge utilization potential. Sweet potato is a traditional raw material crop for ethanol production. It has wide adaptability, tolerance to barrenness, high root yield and starch content. Since the 1980s, studies on sweet potato's salt-alkaline tolerance have been carried out successively. The research content involves the screening of sweet pot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02
Inventor 张海燕解备涛王庆美张立明段文学汪宝卿
Owner CROP RES INST SHANDONG ACAD OF AGRI SCI