Work

Absence of the 1BL/1RS chromosome translocation in the Kavkaz-derived wheat cultivar Tugela

Year: 1994

Type: article

Abstract: The South African bread wheat (Triticum aestivumL) cultivar Tugela (Kavkaz/Jaral'S') is highly resistant to stem rust caused by Puccinia graminis Pers. f. sp. tritici Eriks. & Henn. Based on pedigree analysis and infection types, it has previously been assumed that Tugela derived part of its stem rust resistance from Sr31 in Kavkaz, a Russian wheat cultivar containing the 1BL/1RS chromosome translocation. The association of 1BL/1RS, harbouring the Sr31 and Lr26 genes, with inferior dough-mixing properties, would have excluded Tugela as an important source of rust resistance in most breeding programmes. However, the occurrence of stem rust- susceptible segregates in Tugela/Kavkaz progenies, and the absence of Lr26 suggested that Tugela does not contain 1BL/1RS. This was confirmed by cytological comparisons (C-bands) of chromosomes 1B in Tugela and Kavkaz, and by the absence of 1RS-encoded ω -secalin endosperm protein (SDS-PAGE) in Tugela.

Source: South African Journal of Plant and Soil

DOI: 10.1080/02571862.1994.10634309

Authors: Z. A. Pretorius, G. F. Marais, J. Smith, J. le Roux, F. J. Kloppers

Institutions: University of the Free State, Stellenbosch University

Language: English

Topic: Wheat and Barley Genetics and Pathology

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: bronze

OpenAlex ID: W2055205608

FWCI: 0.507

Cites: 8

Cited by: 2

Related to: 10