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A method for breeding wheat varieties resistant to scab infection and expansion
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A scab and variety technology, applied in the field of wheat variety breeding, can solve problems such as the lack of identification system, achieve the effect of improving screening efficiency and application value
Active Publication Date: 2021-05-25
JIANGSU LIXIAHE REGION AGRI RES INST
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Problems solved by technology
Most of the existing identification methods for scab resistance are used for genetic research or identification of resistance to bred varieties, and the identification system applicable to the entire breeding process is relatively lacking. Therefore, it is urgent to establish a combination of infection resistance and Breeding method for wheat scab-resistant varieties resistant to expansion, so as to ensure that the bred varieties have stable scab-resistant properties
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Embodiment 1
[0026] 1. Parent selection
[0027] To screen and identify the resistance level of germplasm resource materials to scab, it is necessary to have above moderate sensitivity or at least one wheat variety (line) with moderate resistance as the parent for hybridization.
[0028] Zhenmai No. 9 was bred by Zhenjiang Agricultural Science Institute in the hilly area of Jiangsu Province. It has red kernels, hard seeds, and high thousand-grain weight. The plant type is slightly loose, the plant height is 86cm, the scab resistance is moderately resistant (MR), and the yield is increased by 5.6%-9.1% compared with the control in various tests.
[0029] Shijiazhuang No. 8 was bred by Shijiazhuang Academy of Agricultural Sciences. It is semi-winter, white grain, hard, plant height 73cm, high resistance to scab (S), and its yield increased by 3.41%-7.18% compared with the control in various tests.
[0030] In order to further improve the yield potential of Huainan wheat area, in 2007, Zhe...
Embodiment 2
[0043] 1. Parental selection
[0044] To screen and identify the red-resistance level of germplasm resources, the wheat varieties (lines) with at least one medium-susceptibility or at least one medium-resistance must be used as parents for cross-matching.
[0045] Zhenmai 168 was bred by Zhenjiang Institute of Agricultural Sciences in the hilly area of Jiangsu, with spring nature and a plant height of 85cm. Spike fusiform, red kernels, semihorny kernels. Disease resistance identification: medium resistance to scab. Compared with the control, the yield increased by 0.31%-6.2% in all levels of experiments. The protein (dry basis) content is 14.02%-14.73%, the wet gluten content is 28.2%-33.0%, and the stabilization time is 9.3-10.9 minutes, belonging to strong gluten wheat varieties.
[0046] Luyuan 502 was jointly bred by the Institute of Atomic Energy Agricultural Application of Shandong Academy of Agricultural Sciences and the Institute of Crop Science of Chinese Academy...
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Abstract
The invention discloses a breeding method for wheat scab resistance with both infection resistance and expansion resistance. The method comprises the following steps: 1) parental selection and F. 1 Generation acquisition; 2) Breeding low generation selection: F 2 Substitute to F 4 For generations, use single plant or single ear selection, use diseased grain inoculation combined with water spray to moisturize the field to determine the selective pressure of head blight, stop water spray, and screen the target single plant with preliminary resistance to infection; 3) Breeding high Generation Choice: F 5 The target individual plant was further screened for the target individual plant with anti-infection by using spore liquid spray inoculation combined with water spray and moisturizing. 6 Generation pair F 5 The target single plant obtained in the field was simultaneously identified by single flower drip infusion and spore liquid spray to identify the resistance to expansion and infection, and pressured identification in the greenhouse to obtain wheat varieties with both resistance to scab infection and expansion. . The breeding process of the invention has strong operability, can be used for reference in different wheat areas, improves the breeding efficiency, and can obtain stable wheat varieties with resistance to scab.
Description
technical field [0001] The invention belongs to the field of plant breeding, and in particular relates to a breeding method for a wheat variety resistant to scab infection and expansion. Background technique [0002] Wheat head blight is a worldwide disease caused by Fusarium graminearum. my country is the country where the disease is most serious, and the winter wheat area in the middle and lower reaches of the Yangtze River is the most serious area. With the large area of straw returning to the field, the expansion of irrigated area and global warming, wheat scab has gradually spread to the Huanghuai wheat region. The data shows that the average annual occurrence area of wheat scab in my country was about 60 million mu from 2005 to 2010, and the average annual occurrence area rose to more than 80 million mu from 2011 to 2016. In 2012, the national epidemic occurred, and the incidence area of scab disease exceeded 170 million mu, the yield loss reached 7 billion jin. ...
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