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Journal of Heredity Advance Access published online on August 31, 2005
Journal of Heredity, doi:10.1093/jhered/esi091
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© The American Genetic Association. 2005. All rights reserved. For permissions, please email: journals.permissions@oupjournals.org.
Received November 4, 2004
Accepted May 26, 2005

Article

Use of RAPD and AFLP Markers to Identify Inter- and Intraspecific Hybrids of Mentha

A. K. Shasany 1, M. P. Darokar 1, S. Dhawan 1, A. K. Gupta 1, S. Gupta 1, A. K. Shukla 1, N. K. Patra 1, and S. P. S. Khanuja 1*

1 From the Genetic Resources and Biotechnology Division, Central Institute of Medicinal and Aromatic Plants (CIMAP), P.O. CIMAP, Lucknow 226015, India

* To whom correspondence should be addressed.
S. P. S. Khanuja, E-mail: khanujazy{at}yahoo.com


  Abstract

Three controlled crosses were carried out involving Mentha arvensis and Mentha spicata [M. spicata CIMAP/C30 x M. spicata CIMAP/C33 (cv. Neera); M. arvensis CIMAP/C18 x CIMAP/C17 (cv. Kalka); and M. arvensis CIMAP/C17 x M. spicata CIMAP/C33]. The parents were subjected to random amplified polymorphic DNA (RAPD) analysis with 80 primers, and polymorphic primers were tested for detecting coinherited RAPD profiles among the progeny of these crosses. Of 50 seedlings tested from each intraspecific cross, all demonstrated dominant profiles with the selected RAPD primers except the detected hybrid from respective crosses. Coinherited markers could be detected with the primers OPJ 01, MAP 06, OPT 08, and OPO 20 for M. arvensis; OPJ 05, OPJ 14, OPO 19, and OPT 09 for M. spicata; and OPJ 07, OPJ 10, OPJ 11, OPJ 14, and OPO 02 for the cross M. arvensis x M. spicata. In our amplified fragment length polymorphism (AFLP) analysis, 40 coinherited marker fragments were identified for the cross involving M. arvensis, 32 for the cross involving M. spicata, and 41 for the interspecific cross between M. arvensis and M. spicata. In all crosses, similarity values between the parents were less than those between the parents and the hybrids. Although RAPD markers are generally considered dominant, it is possible to identify a few codominant markers that behave like restriction fragment length polymorphism (RFLP) markers. This molecular marker system may be helpful in rapidly screening out hybrids in crops where cross-pollination is a problem.


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