Molecular marker closely linked with major QTL (Quantitative Trait Loci) of wheat ear length and application of molecular marker

The invention discloses a molecular marker closely linked with major QTL (Quantitative Trait Loci) of wheat ear length and application of the molecular marker in wheat assisted breeding and genetic improvement, and belongs to the technical field of wheat molecular biotechnology and breeding. The molecular marker is 2BL-63 and is located on a 2B chromosome of wheat, the nucleotide sequence of the molecular marker is as shown in SEQ ID NO: 3, the sequence length of the molecular marker is 421bp, and the molecular marker can be obtained by amplifying an upstream primer as shown in SEQ ID NO: 1 and a downstream primer as shown in SEQ ID NO: 2. The molecular marker 2BL-63 provided by the invention fully embodies the spike length major QTL of the wheat variety (line), can quickly and accurately judge whether the wheat variety (line) has the spike length major QTL or not, and provides excellent gene resources and selection tools for wheat yield trait molecular breeding. 本发明公开了一种与小麦穗长主效QTL紧密连锁的分子标记及其在小麦辅助育种及遗传改良中的应用，