NDLI: Isolation and characterization of Tnd-1, a retrotransposon marker linked to black root rot resistance in tobacco

Content Provider	Springer Nature Link
Author	Kenward, K. D. Bai, D. Ban, M. R. Brandle, J. E.
Copyright Year	1999
Abstract	In Nicotiana debneyi, resistance to a wide range of black root rot (Chalara elegans) isolates is conferred by a single dominant gene. This gene has been transferred to cultivated tobacco (Nicotiana tabacum) and was recently discovered to be linked in coupling to a 1050-bp random amplified polymorphic DNA (RAPD) marker generated with the UBC 418 primer. We have cloned and sequenced the UBC4181050 marker and found it to be part of a retrotransposon. This retrotransposon is a remnant of the N. debneyi genome and is the first to be isolated from this species. Transposon N. debneyi (Tnd)-1 is present in the tobacco genome as two directly repeated copies, and in multiple copies in the donor species N. debneyi and in a number of related Nicotiana species. The retrotransposon appears to have been introduced into the Nicotiana genome after the development of the Suavolentes progenitors. The gene associated with black root rot resistance co-segregates with the retrotransposon in tobacco and is thought to be contained within the introgressed fragment marked by Tnd-1. The retrotransposon will therefore be a useful species-specific landmark that can be used for future cloning of the resistance gene.
Starting Page	387
Ending Page	395
Page Count	9
File Format	PDF
ISSN	00405752
Journal	Theoretical and Applied Genetics
Volume Number	98
Issue Number	3
e-ISSN	14322242
Language	English
Publisher	Springer-Verlag
Publisher Date	1999-03-24
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Biotechnology Agronomy and Crop Science

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