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SRAP analysis on the genetic relationships of 24 mulberry (Morus L.) accessions in the lower regions of the Yellow River

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Abstract

SRAP molecular marker was used to detect the genetic diversity of 24 mulberry genotypes in the lower regions of the Yellow River in order to analyze the genetic relationships and pedigrees in the genus Morus L. Out of 88 PCR fragments scored, 69 (78.41 %) were polymorphic, with an average of 6.9 polymorphic bands and 8.0 bands per SRAP primer combination. A high degree of polymorphism was revealed by these combinations that ranged from 66.7 to 100 % across all the accessions studied. The genetic similarity coefficients among 24 local cultivars were relatively high with a range of 0.623–0.978. Both species of M. alba and M. multicaulis presented the abundant variations. As out-group, M. mongolica and M. bombycis were separated in the clustering tree, and other genotypes were divided into four groups. Clustering of some accessions of M. alba and M. multicaulis into strictly separate species was not readily apparent, in spite of their different geographic origin. The materials of M. alba and M. multicaulis were tangled in the different groups on dendrogram, which revealed that they have relatively close genetic relationships. High degree of cross-species reproductive success was encountered often in mulberry breeding programme, which caused the complex genetic background. Some accessions were proved to be inter-specific hybrid progenies by SRAP genetic information. Additional phylogenetic studies using cytoplasmic gene sequences would be helpful to further evaluate the systematic positions of these species or new established genotypes.

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Acknowledgments

This work was financially supported by Natural Science Foundation of China (No. 31000308), Outstanding Young Scientist Research Award Fund of Shandong Province (No. BS2010NY006), a Project of Shandong Province Higher Educational Science and Technology Program (No. J10LC02) and Yantai Science and Technology Development Project (No. 2010164).

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Authors and Affiliations

  1. College of Life Science, Ludong University, Yantai, 264025, China

    Dechang Hu, Ping Zhang, Wen Hao & Yanlin Sun

  2. Sericulture Research Institute of Shandong Province, Yantai, 264002, China

    Zhaohong Wang & Chuanjie Chen

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  1. Dechang Hu
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  2. Ping Zhang
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  3. Wen Hao
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  4. Yanlin Sun
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  5. Zhaohong Wang
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  6. Chuanjie Chen
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Correspondence to Dechang Hu.

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Hu, D., Zhang, P., Hao, W. et al. SRAP analysis on the genetic relationships of 24 mulberry (Morus L.) accessions in the lower regions of the Yellow River. Genet Resour Crop Evol 62, 13–19 (2015). https://doi.org/10.1007/s10722-014-0215-1

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