CHROMOSOME LOCATION OF GENES-CONTROLLING TOLERANCE TO SALT (NACL) AND VIGOR IN HORDEUM-VULGARE AND HORDEUM-CHILENSE

Wheat/Hordeum vulgare and wheat/H. chilense disomic chromosome addition lines have been used to locate genes influencing tolerance to salt to specific chromosomes of the H and Hch genomes of H. vulgare and H. chilense respectively. The addition lines were grown in hydroculture containing either 0 mol m–3, 175 mol m–3 or 200 mol m–3 sodium chloride. Various growth and yield parameters were measured and comparisons were made both between species and between chromosomes. Plat vigour was found to have a major effect on tolerance to salt in the wheat/H. vulgare addition lines. Vigorous genotypes, in control conditions generally performed well in saline conditions. However, significant interactions between genotype and salt concentration were found and this indicated specific chromosomes with positive and negative effects. Genes with positive effects for salt tolerance were located to chromosomes 4H and 5H of H. vulgare and 1Hch, 4Hch and 5Hch of H. chilense. The genetic control of salt tolerance is discussed. © 1990 The Genetical Society of Great Britain.