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Molecular evidence for the hybrid origin of Paulownia Taiwaniana based on RAPD markers and RFLP of chloroplast DNA

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Abstract

Genomic DNA of Paulownia fortunei, P. kawakamii and P. taiwaniana were amplified with 10-base primers of arbitrary sequences using the polymerase chain reaction (PCR). A total of 351 DNA fragments were amplified from 23 primers and of these 265 fragments (75.5%) were polymorphic. Almost all of the PCR-amplified products of P. taiwaniana were shared by either P. fortunei or P. kawakamii, or both, and the number of polymorphic fragments shared by P. taiwaniana and P. fortunei was about equivalent to those shared by P. taiwaniana and P. kawakamii. Restriction fragments of chloroplast DNA (cpDNA) purified from Paulownia species and from reciprocal crosses between P. fortunei and P. kawakamii were analyzed. Restriction enzyme SalI-digested cpDNA showed an identical pattern in both P. kawakamii and P. taiwaniana. These results further support the hypothesis that P. taiwaniana is the natural hybrid between P. fortunei and P. kawakamii and that the maternal parent of P. taiwaniana is P. kawakamii.

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This work was supported in part by the National Science Council (NSC-80-0409-B-054-06), Republic of China

Communicated by P. M. A. Tigerstedt

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Wang, W.Y., Pai, R.C., Lai, C.C. et al. Molecular evidence for the hybrid origin of Paulownia Taiwaniana based on RAPD markers and RFLP of chloroplast DNA. Theoret. Appl. Genetics 89, 271–275 (1994). https://doi.org/10.1007/BF00225153

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Key words

  • RAPD
  • RFLP
  • Chloroplast DNA
  • Natural hybrid
  • Paulownia taiwaniana