Breeding method of group hybridization of sweet potatoes

A hybrid seed and group technology, applied in the field of hybrid seedling breeding, can solve the problems of difficult combination configuration, affecting breeding efficiency, complex genetic basis, etc., and achieve the effect of shortening breeding time and improving breeding efficiency.

Inactive Publication Date: 2019-01-01
INST OF CEREAL & OIL CROPS HEBEI ACAD OF AGRI & FORESTRY SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sweet potato is a cross-pollinated crop. The genetic basis of sweet potato is complex, the seeds are highly segregated, self-incompatible, and there are infertile groups. There is no pure line, and the same locus gene is highly hete...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Among the high starch germplasms, Jishu 98, Jishu 65, Yiwohong, Shengli 100, Xushu 18, Shangshu 19, Yushu 13, Wanshu 5, Wanshu 6, Eshu 6, Yushu 17 and Huang Jinqianguan were used as parents. Five potato seedlings were planted for each parent, a total of 60 potato seedlings, and the above potato seedlings were randomly cross-planted to obtain a hybrid group. Cover the hybrid group with a 45-mesh insect net. Every day from 18:00 pm to 8:00 the next day, the potato seedlings were covered with a sunshade net with a shading rate of 100% to induce flowering, and 150 bees were placed in the hybrid group to assist in pollination. When the hybrid group matures, the seeds in the group are mixed to obtain hybrid seeds. Accelerating the obtained hybrid seeds to obtain seedlings, multiplying the seedlings to more than 4 strains, performing quality identification on the obtained multiplied seedlings, and screening super-parent strains with higher target traits than the parents. Se...

Embodiment 2

[0043] Among the high starch germplasms, Jishu 98, Jishu 65, Yiwohong, Shengli 100, Xushu 18, Shangshu 19, Yushu 13, Wanshu 5, Wanshu 6, Eshu 6, Yushu 17 and Huang Jinqianguan were used as parents. Eight potato seedlings were planted for each parent, and the above potato seedlings were randomly cross-planted to obtain a hybrid group. Cover the hybrid group with a 35-mesh insect net. From 17:00 pm to 9:00 the next day, the potato seedlings were covered with a sunshade net with a shading rate of 100% to induce flowering, and 100 bees were placed in the hybrid group to assist in pollination. When the hybrid group matures, the seeds in the group are mixed to obtain hybrid seeds. Accelerating the obtained hybrid seeds to obtain seedlings, multiplying the seedlings to more than 4 strains, performing quality identification on the obtained multiplied seedlings, and screening super-parent strains with higher target traits than the parents. Select 10 super-parent lines, continue to c...

Embodiment 3

[0049] Mingmen Jinshi, Gaoxi 14, Xinxiang, Zheshu 13, Jinganshu 3, Yizi 138, Beijing 553, Xinong 431, Jishu 4 and egg yolk were selected as parents in fresh germplasm. Seven potato seedlings were planted for each parent, and the above potato seedlings were randomly cross-planted to obtain a hybrid group. Cover the hybrid group with a 40-mesh insect net. Every day from 17:00 pm to 9:00 the next day, the potato seedlings were covered with a sunshade net with a shading rate of 100% to induce flowering, and 125 bees were placed in the hybrid group to assist in pollination. When the hybrid group matures, the seeds in the group are mixed to obtain hybrid seeds. Accelerating the obtained hybrid seeds to obtain seedlings, multiplying the seedlings to more than 4 strains, performing quality identification on the obtained multiplied seedlings, and screening super-parent strains with higher target traits than the parents. Select 10 to 15 super-parent lines, continue to carry out random...

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Abstract

The invention provides a breeding method of group hybridization of sweet potatoes and belongs to the technical field of hybridization breeding. One type of sweet potatoes with a certain prominent property are prepared into a hybridization group and individuals with prominent properties are selected year by year, so as to realize gene polymerization; the individuals are used as a selfing line; thehybridization breeding between groups is carried out, so that hybrid seeds with good quality and properties are obtained. According to the breeding method provided by the invention, a gene is polymerized and the purposiveness is realized; meanwhile, a target variety can be obtained through 4 to 6 generations of reproduction. The breeding time is shortened and the breeding efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of hybrid seedling cultivation, and in particular relates to a hybrid breeding method of sweet potato groups. Background technique [0002] Sweet potato (Ipomoea batatas L.), also known as sweet potato, is a twining herbaceous vine of the genus Dioscorea in the Dioscoreaceae family. It is an important food and feed crop in the world, as well as an important industrial raw material and new energy material. Sweet potato is a cross-pollinated crop. The genetic basis of sweet potato is complex, the seeds are highly segregated, self-incompatible, and there are infertile groups. There is no pure line, and the same locus gene is highly heterozygous. It is difficult to combine and configure as expected, and at the same time, the separation of seedling populations is complicated, and it is difficult to select excellent single plants, which greatly affects the breeding efficiency. Contents of the invention [0003]...

Claims

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Application Information

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IPC IPC(8): A01H1/02
CPCA01H1/02
Inventor 马志民胡亚亚刘兰服韩美坤胡阿丽王亚楠高志远焦伟静
Owner INST OF CEREAL & OIL CROPS HEBEI ACAD OF AGRI & FORESTRY SCI
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