The invention discloses an
InDel molecular marker for detecting
black spot resistance of broccoli, a method and application, and relates to the field of
molecular biology. The site is located at 56724071bp-56724089bp of a broccoli
chromosome 5, and the site has
insertion / deletion variation of 18bp basic groups (the
nucleotide sequence is as shown in SEQ ID NO. 1). When the site has a 18bp basic group (the sequence of an amplification product is shown as SEQ ID NO.2), the broccoli is a
black spot resistant
plant; otherwise, the plants are
black spot sensitive plants. The invention also discloses a pair of
specific primers for detecting the
InDel molecular marker, and the
nucleotide sequences of the
specific primers are respectively shown as SEQ ID NO. 4 and SEQ ID NO. 5. The
InDel molecular marker can rapidly and accurately detect the black spot resistance of broccoli
germplasm resources at low cost, does not need field
inoculation identification, can be used for early screening of broccoli black spot resistance varieties and molecular marker-assisted breeding, significantly improves the breeding efficiency, and shortens the breeding period.