一个水稻根长QTL qRL4的分离鉴定

Identification of qRL4,a Major Quantitative Trait Locus Associated with Rice Root Length

为了分离鉴定qRL4,以超级稻协优9308衍生重组自交系与轮回亲本中恢9308(R9308)回交多代的高代回交群体为材料,利用琼脂无土栽培技术,开展水稻根长QTL qRL4的分离鉴定研究,最后将qRL4定位在第4染色体分子标记RM5687与InDel49间624.6kb范围内。此基因的定位与分离鉴定将有助于水稻根长相关遗传机理的研究,为探究在基因水平上的水稻根系形态建成奠定了坚实基础。

To identify the qRL4,rice lines derived from the hybrid rice Xieyou 9308 with genetic backgroud of Zhonghui 9308（R9308）and substituted segements from Xieqingzao B（XB）were agar-cultivated for phenotyping of rice seedling root length and molecular marker-based genotyping.The qRL4 was finally narrowed to a 624.6kb interval（RM5687-InDel49）on chromosome 4.The identification of qRL4 will be helpful to clarify genetic factors controlling root architecture in rice.