Genetic dissection of rhizome yield-related traits in Nelumbo nucifera through genetic linkage map construction and QTL mapping

文献类型： 外文期刊

第一作者： Huang, Longyu

作者： Huang, Longyu;Li, Ming;Yang, Pingfang;Cao, Dingding

作者机构：

关键词： Nelumbo nucifera; Rhizome; QTL mapping; Genetic linkage map

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：3.72； 五年影响因子：3.966 ）

ISSN： 0981-9428

年卷期： 2021 年 160 卷

页码：

收录情况： SCI

摘要： Lotus (Nelumbo nucifera) is a perennial aquatic plant with great value in ornamentation, nutrition, and medicine. Being a storage organ, lotus rhizome is not only used for vegetative reproduction, but also as a popular vegetable in Southeast Asia. Rhizome development, especially enlargement, largely determines its yield and hence becomes one of the major concerns in rhizome lotus breeding and cultivation. To obtain the genetic characteristic of this trait, and discover markers or genes associated with this trait, an F-2 population was generated by crossing between temperate and tropical cultivars with contrasting rhizome enlargement. Based on this F-2 population and Genotyping-by-Sequencing (GBS) technique, a genetic map was constructed with 1475 bin markers containing 12,113 SNP markers. Six traits associated with rhizome yield were observed over 3 years. Quantitative trait locus (QTL) mapping analysis identified 22 QTLs that are associated with at least one of these traits, among which 9 were linked with 3 different intervals. Comparison of the genes located in these three intervals with our previous transcriptomic data showed that light and phytohormone signaling might contribute to the development and enlargement of lotus rhizome. The QTLs obtained here could also be used for marker-assisted breeding of rhizome lotus.

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