Authors:
J. Díaz De León Universidad Autónoma de Baja California Sur (UABCS) Depto. Agronomóa, Lab. Biotecnología Vegetal Apdo. Postal 19-B 23000 La Paz, B.C.S. Mexico

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R. Escoppinichi Universidad Autónoma de Baja California Sur (UABCS) Depto. Agronomóa, Lab. Biotecnología Vegetal Apdo. Postal 19-B 23000 La Paz, B.C.S. Mexico

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R. Zavala-Fonseca Universidad Autónoma de Baja California Sur (UABCS) Depto. Agronomóa, Lab. Biotecnología Vegetal Apdo. Postal 19-B 23000 La Paz, B.C.S. Mexico

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T. Castellanos Centro de Investigaciones Biológicas del Noroeste (CIBNOR) Apdo. Postal 128 23000 La Paz, B.C.S. Mexico

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M. Röder Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Corrensstrasse 3 06466 Gatersleben Germany

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A. Mujeeb-Kazi Nuclear Institute of Biotechnology and Genetic Engineering (NIBGE) Faisalabad Pakistan

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To determine limits of tolerance, provide information about genetic diversity, and explore potential as progenitors for a salt-tolerant wheat improvement program, we collected several landraces and genotypes reputed to be salt-tolerant. Salt tolerance was tested by irrigation with a diluted solution of seawater with 12 dS.m −1 electrical conductivity for two years. Phenotypic parameters of percent of emergence, days to flowering to spike emergence, and physiological maturity were not significantly affected. Leaf area was sensitive to salt stress and inhibited about 30%. Plant height was inhibited 30%, while spike length and number of grains per spike were not. Total yield of Shorawaki and Kharchia landraces confirmed their reputation as salt-tolerant. Cultivars Mepuchi, Pericu, Calafia, WH157, and SNH-1 were inhibited at a moderate level of tolerance; cultivars Cochimí, Lu26S, and KRL 1–4 were inhibited, as was the control cultivar Oasis by up to 50%. To amplify microsatellites from genomes A, B, and D, 33 pairs of primers were used. The microsatellite WMS169-6A was highly polymorphic, with 10 different alleles distinguishing the genotype set. Also, the short arm of chromosome 4D microsatellites were amplified and found to be monomorphic, which suggests highly conserved alleles. The other microsatellites had variable polymorphism. In total, 120 alleles were obtained and used to define genetic diversity. The resulting dendrogram showed that landraces Shorawaki and Kharchia are distantly grouped from all other cultivars, as well as the cultivar Chinese Spring. Strikingly, KRL1–4, a derivative of Kharchia, did not show a close relationship to its source. The geographic origin did not influence pair-wise combinations. However, pedigree did influence pair-wise combinations.

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Cereal Research Communications
Language English
Size A4
Year of
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1973
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per Year
1
Issues
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4
Founder Akadémiai Kiadó
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Springer Nature Switzerland AG
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ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)