Method for cultivating anti-cyanosis transgenic cotton and special expression vector thereof
An expression vector, a technology for verticillium wilt, which can be used in the introduction of foreign genetic material using vectors, genetic engineering, plant genetic improvement, etc., and can solve problems such as lack of in-depth understanding of plant disease resistance mechanisms.
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Embodiment 1
[0026] The construction of embodiment 1 expression vector
[0027] 1. Contains SPGAFP 1 Construction of high-efficiency expression vector
[0028] Synthetic SPGAFP 1 gene, SPGAFP 1 The nucleotide sequence of is sequence 1 in the sequence listing. SPGAFP 1 Connected to pUCm-T (purchased from Shanghai Sangon Bioengineering Co., Ltd.) to construct vector pUCm-SPGAFP 1 .
[0029] Digest pUCm-SPGAFP with XbaI and SacI respectively 1 and pBI221 (purchased from Clontech Laboratories, Inc.), the SPGAFP after digestion 1 The fragment was ligated to the pBI221 vector that cut the 1.9Kb GUS fragment with the same enzyme to obtain the intermediate vector pBI35S-SPGAFP 1 .
[0030] Digest intermediate vector pBI35S-SPGAFP with HindIII and SacI 1 get 35S-SPGAFP 1 Fragment, pCambia2300 (purchased from Cambia Laboratories Company) was digested with the same enzyme, and the two were connected to obtain the expression vector pCambia2300-35S-SPGAFP 1 . Bacteria and plant resistance ...
Embodiment 2
[0031] Example 2 will contain SPGAFP 1 The high-efficiency expression vector was introduced into cotton to obtain SPGAFP 1 cotton
[0032] Transformation of SPGAFP by Agrobacterium-mediated method 1 cotton
[0033] 1) the expression vector pCambia2300-35S-SPGAFP obtained in Example 1 1 Transform into Agrobacterium tumefaciens LBA4404 (purchased from Invitrogen Company), construct SPGAFP-containing 1 Expression vector Agrobacterium tumefaciens LBA4404 / pCambia2300-35S-SPGAFP 1 .
[0034] Pick LBA4404 / pCambia2300-35S-SPGAFP 1 A single colony of Agrobacterium was inoculated in 20ml of YEP medium containing 50mg / L kanamycin, 50mg / L rifampicin and 30mg / L streptomycin, and cultured overnight at 28°C and 280rpm until the OD600 was 0.7-0.8. Then centrifuge at 5000rpm, discard the supernatant, and resuspend the pellet with MS liquid medium. Finally, the upland cotton "Zhongmian Institute 24" (Yu Ya, Liu Chuanliang, Ma Zhiying, Li Fuguang, Li Fenglian, Wang Yufen, Wu Zhixia, Zhang ...
Embodiment 3
[0040] Embodiment 3 transfer pCambia2300-35S-SPGAFP 1 Screening of Cotton Progeny and Detection of Verticillium Wilt Resistance
[0041] 1. Preliminary screening of SPGAFP by kanamycin 1 cotton offspring
[0042] When the transformed cotton seedlings obtained in Example 2 grew 3 to 4 true leaves, the blades were smeared with kanamycin and transformed into SPGAFP 1 The preliminary screening experiment of cotton, the specific steps are as follows: apply kanamycin with a concentration of 1.0% on the surface of seedling leaves, observe after 5 days, the results show that some of the SPGAFP 1 The smear spots on the leaves of individual cotton plants turn yellow, and these individual plants with yellow leaves are symptomatic individual plants. Eliminate these symptomatic single plants, and continue the second round of screening and elimination of the remaining single plants, so that they are smeared three times in a row, and 36 T0-transferred SPGAFP strains are selected for three...
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