Method for detecting V1109L mutation site in phytophthora parasitica var. nicotianae cellulose synthase
A technology of V1109L and cellulose synthase, applied in the field of tobacco genetic engineering
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Embodiment 1
[0064] Based on the obvious differences in the resistance of related strains and the reason for the mutation of related genes in other existing species, the inventors believe that it is necessary to analyze the cellulose synthase related genes in Phytophthora tabacum CesA3 Whether there are similar mutation sites in the sensitive and mutant strains is further studied, and the process of determining the relevant mutation sites is briefly introduced in this example as follows.
[0065] (1) Design primers
[0066] According to the cellulose synthase gene of the existing pathogens (Phytophthora soybean, Phytophthora infestans, Phytophthora oak) and the genome sequence of Phytophthora nicotianae, combined with the results of homologous comparison, PCR amplification was designed according to the conserved sequence fragments to obtain the tobacco Phytophthora mycocellulose synthase related gene CesA3 The primer sequences are as follows:
[0067] A3F11: 5'-ATGGGGCTCACCGGC-3',
[...
Embodiment 2
[0086] Based on the results of the single point mutation in Example 1, and in combination with the requirements of the AS-PCR method, the inventors further designed relevant primers to detect and determine the relevant mutation sites. The specific process is introduced as follows.
[0087] (1) Primer design
[0088] Based on the aforementioned single-base mutation sequence difference and AS-PCR method requirements, the inventor designed the primer sequence for the Q1077H mutation site as follows:
[0089] Pn3231-F1: 5'-GGCTTCTTCGTCATGAGCCAT-3',
[0090] PnA3-R: 5'-CTACGTCGACGCCGTCGAAC-3';
[0091] What needs to be explained is that when designing the primers, in order to improve the specificity of the primers, the penultimate base of the 3' end of Pn3231-F1 was mismatched with the target sequence, and at the same time, it was coordinated with the adjustment of the subsequent PCR amplification program to detect The mutation site G3231T;
[0092] For the V1109L mutation site...
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