HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Nelson, J. C. Articles by Sorrells, M. E. Search for Related Content PubMed Articles by Nelson, J. C. Articles by Sorrells, M. E. Agricola Articles by Nelson, J. C. Articles by Sorrells, M. E.

Chromosomal Location of Genes for Resistance to Karnal Bunt in Wheat

Dep. of Plant Breeding and Biometry, 252 Emerson Hall, Cornell Univ., Ithaca, NY 14853, USA
Wheat Program, International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico

^* Corresponding author (mes12{at}cornell.edu).

Karnal bunt (Tilletia indica Mitra) infestation of wheat (Triticum aestivum L.) kernels reduces grain quality. Deployment of genetic resistance would be preferable to chemical applications for control of the disease. Inoculation studies were carried out in a wheat mapping population with the aim of locating genes for resistance. Recombinant inbred (RI) lines from a cross between a resistant synthetic wheat (Triticum turgidum ‘Altar 84’ & T. tauschii) and the susceptible common wheat cultivar ‘Opata 85’ were inoculated with Karnal bunt sporidial suspension and evaluated for symptom development in the field for three seasons and in the greenhouse. Based on restriction fragment length polymorphism (RFLP) analyses, regions on chromosome arms 3BS and SAL carrying marker alleles from the Altar durum parent were consistently associated with reduced kernel disease. Main marker effects accounted for up to 32% of disease variation in the field but only 15% in the greenhouse, where the level of disease was higher, suggesting an environmental component of resistance. The tagging of these Karnal bunt partial-resistance genes in tetraploid and hexaploid backgrounds may facilitate the accumulation of resistance via marker-assisted transfer to susceptible durum and common wheat cultivars. This practice should reduce laborious disease screening requirements.

Received for publication March 12, 1997.

This article has been cited by other articles:

				T. B. Adhikari, H. Wallwork, and S. B. Goodwin Microsatellite Markers Linked to the Stb2 and Stb3 Genes for Resistance to Septoria Tritici Blotch in Wheat Crop Sci., July 1, 2004; 44(4): 1403 - 1411. [Abstract] [Full Text] [PDF]

				R.P. Singh, J.C. Nelson, and M.E. Sorrells Mapping Yr28 and Other Genes for Resistance to Stripe Rust in Wheat Crop Sci., July 1, 2000; 40(4): 1148 - 1155. [Abstract] [Full Text]