PROBLEM TO BE SOLVED: To provide a sugarcane-stalk-number-related marker among the quantitative traits thereof, and a method for producing a sugarcane strain with increased stalk number.SOLUTION: The sugarcane-stalk-number-related marker comprises consecutive nucleic acid regions selected from regions sandwiched by specific base sequences in sugarcane chromosome. The method for producing a sugarcane strain with increased stalk number is also provided, comprising a step of extracting a chromosome of a progeny plant where at least one parent thereof is sugarcane and a step of assaying the presence/absence of the stalk-number-related marker in the chromosome obtained by the preceding step. In this method, the progeny plant is in the form of seeds or juvenile seedlings, and the first step comprises extracting the chromosome from the seeds or juvenile seedlings.COPYRIGHT: (C)2012,JPO&INPIT【課題】サトウキビの量的形質の中でも茎数に関連するマーカー、茎数が増大したサトウキビ系統の製造方法を提供する。【解決手段】サトウキビの染色体における特定の塩基配列により挟まれる領域から選ばれる連続する核酸領域からなる、サトウキビの茎数関連マーカー。少なくとも一方の親がサトウキビである後代植物の染色体を抽出する工程と、上記で得られた染色体における茎数関連マーカーの存在・非存在を測定する工程とを含む、茎数が増大したサトウキビ系統の製造方法。後代植物は種子又は幼苗であり、当該種子又は幼苗から染色体を抽出するサトウキビ系統の製造方法。【選択図】図4
