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Genotypic variation in the response to embryogenic callus induction and regeneration in Saccharum spontaneum

文献类型： 外文期刊

作者： Li, Chunjia 1 ; Li, Xujuan 1 ; Lin, Xiuqin 1 ; Qin, Wei 1 ; Lu, Xin 1 ; Mao, Jun 1 ; Liu, Xinlong 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Sugarcane Res Inst, Yunnan Key Lab Sugarcane Genet Improvement, Kaiyuan 661699, Peoples R China

关键词： crop wild relative; embryogenic callus; genotypic variation; Saccharum spontaneum; sugarcane; tissue culture

期刊名称：PLANT GENETIC RESOURCES-CHARACTERIZATION AND UTILIZATION （ 影响因子：1.08； 五年影响因子：1.243 ）

ISSN： 1479-2621

年卷期： 2021 年 19 卷 2 期

页码：

收录情况： SCI

摘要： Embryogenic callus induction and regeneration are useful in many aspects of plant biotechnology, especially in the functional characterization of economically important genes. However, in sugarcane, callus induction and regeneration vary across genotypes. Saccharum spontaneum is an important wild germplasm that confers disease resistance and stress tolerance to modern sugarcane cultivars, and its genome has been completely sequenced. The aim of this study was to investigate the effect of genetic variations on embryogenic callus induction and regeneration in S. spontaneum and to screen genotypes having high tissue culture susceptibility. The study was performed using nine genotypes of S. spontaneum and the following five parameters were assessed to determine the response of genotypes to embryogenic callus induction and regeneration: callus induction, embryogenic callus ratio, embryogenic callus induction, embryonic callus regeneration and regeneration capacity. All the genotypes varied significantly (P < 0.01) in all the parameters, except for embryonic callus regeneration, which was high (>80%) for all the genotypes. High broad-sense heritability (86.1-96.8%) indicated that genetic differences are the major source of genotypic variations. Callus induction was found to be strongly positively correlated with embryogenic callus induction (r = 0.890, P < 0.01) and regeneration capacity (r = 0.881, P < 0.01). Among the nine tested genotypes, VN2 was found to be the most responsive to tissue culture and could therefore be used to characterize functional genes in S. spontaneum. We also suggested an approach with potential applications in facilitating the rapid identification of sugarcane genotypes susceptible to tissue culture.

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