JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (5): 10-18.doi: 10.12302/j.issn.1000-2006.202012046

Special Issue: 专题报道

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SSR-based hybrid identification, genetic analyses and fingerprint development of hybridization progenies from sympodial bamboo (Bambusoideae, Poaceae)

YUAN Jinling1, MA Jingxia2, ZHONG Yuanbiao1, YUE Jinjun1   

  1. 1 Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
    2 Anji Bamboo Exposition Garden Co., Ltd., Huzhou 313300, China
  • Received:2020-12-28 Accepted:2021-03-10 Online:2021-09-30 Published:2021-09-30

Abstract:

【Objective】 The study aims to accurately verify sympodial bamboo hybrids, clarify genetic relationships between hybrids and their parents, and develop applicable fingerprints. 【Method】 We screened, tested and analyzed 30 pairs of randomly selected published bamboo simple sequence repeat (SSR) primers using hybrids derived from Bambusa multiplex × Dendrocalamus latiflorus and B. multiplex × B. chungii crosses. 【Result】 According to the results, six SSR primer pairs (P8, P9, P18, P19, P20 and P27) were suitable for the hybrid identification and genetic analysis of the B. multiplex × D. latiflorus cross, which revealed that all 34 progenies were true hybrids (100%). Six SSR primer pairs (P2, P9, P10, P11, P20 and P28) were suitable for the hybrid identification and genetic analysis of the B. multiplex × B. chungii cross, which revealed that 54 of the 59 progenies were true hybrids (91.5%). Hybrids of the B. multiplex × D. latiflorus cross inherited more maternal alleles, while hybrids of the B. multiplex × B. chungii cross inherited more paternal alleles. The alleles detected using SSR primers were used to construct hybrid fingerprints of the two crosses for variety protection. 【Conclusion】 The SSR primers could be used to effectively verify sympodial bamboo hybrids as the progeny inherited alleles from different parents at varying probabilities in different crosses. In addition, the development of hybrid fingerprints could facilitate variety protection.

Key words: sympodial bamboo, hybridization progenies, simple sequence repeat (SSR), hybrid identification, genetic analyses, fingerprint

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