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Published in Crop Sci 39:639-642 (1999)
© 1999 Crop Science Society of America
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Inheritance and Linkage Analysis of Frost Injury in Lentil

I. Eujayl, W. Erskine* and M. Baum

Germplasm program, ICARDA, P.O. Box 5466, Aleppo, Syria

E. Pehu

Dep. of Plant Production, PL 27 (Viikki, C-talo) 00014, Univ. of Hilsinki, Finland

* Corresponding author(w.erskine{at}cgnet.com).

Radiation-frost injury is an important abiotic constraint to lentil (Lens culinaris Medik.) production in West Asia, but no information has been published on the inheritance of radiation-frost injury in lentil. The objectives of the study were to determine the mode of inheritance of radiation-frost tolerance and to locate the genes for tolerance in the lentil genome by means of a population of recombinant inbrd lines (RILs). The experiments were grown in a randomized complete block design for 2 yr in north Syria. There was a highly significant difference (P < 0.001) in plant frost injury levels among RILs. This was found consistent over two seasons and may provide a good source of genetic variation. The frost tolerance trait was inherited as a 1:1 ratio of tolerant to susceptible in RILs, suggesting monogenic inheritance. The RILs were genotyped with 254 DNA markers. A random amplified polymorphic DNA (RAPD) marker, OPS-16750, was linked to the locus for radiation-frost tolerance (Frt) trait at 9.1 centimorgans (cM). The RAPD marker eo-segregated with frost tolerance (in cis) in selected contrasting RILs. This marker is highly repeatable and may be used to expedite screening of germplasm resources for frost tolerance.

International Center for Agricultural Research in the Dry Areas, Publ. no. JA106/97.

Received for publication January 2, 1998.




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