The invention belongs to the field of citrus
genomics and discloses a co-dominance
InDel molecular marker for identifying single
embryo and multiple embryos of citrus and application thereof. By carrying out depth re-sequencing on whole
genome DNA of 107 materials including tangelos and oranges, whole
genome sequence information is obtained, by means of comparing and screening, the
gene sequence information in single-
embryo and multi-
embryo candidate areas is obtained, the sequence with the highest relevance degree to
phenotype is screened out, and the sequence is an
InDel sequence of 6bp. Accordingly, a set of simple, fast and co-dominant PCR markers are developed, and primers are used for carrying out PCR amplification on CK F / R, INS F / R and DEL F / R, so that the co-dominance
InDel molecular marker for identifying the single embryo and the multiple embryos of the citrus is obtained. Finally, the marker is utilized for testing loci in 115 single-
plant natural groups and 100 single-
plant hybridized groups. The marker has the biggest advantages that cost is low, accuracy is high, and embryonic early selection can be achieved during the citrus
seedling stage.