Genotypic variability for carbon isotope discrimination in the mutant and improved lines of barley

Drought tolerance is an important breeding objective in dry and semi-dry conditions. Carbon isotope discrimination (Δ) is a tool that may be used to improve water-use efficiency (WUE) as an indirect selection criterion. The study investigated the variability for Δ in improved F 7 lines and their par...

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Published in:Isotopes in environmental and health studies 2005-09, Vol.41 (3), p.229-235
Main Authors: Çağirgan, M. İlhan, Özbaş, M. Onur, Heng, Lee K., Afza, Rownak
Format: Article
Language:English
Subjects:
Aridity
Barley
Carbon Isotopes - analysis
Carbon-13
Genetic Techniques
Genetic Variation
Genotype
Heritability
Hordeum - genetics
Hordeum - growth & development
Hordeum vulgare
Mutant
Mutation
Natural abundances
Turkey
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container_title Isotopes in environmental and health studies
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creator Çağirgan, M. İlhan
Özbaş, M. Onur
Heng, Lee K.
Afza, Rownak
description Drought tolerance is an important breeding objective in dry and semi-dry conditions. Carbon isotope discrimination (Δ) is a tool that may be used to improve water-use efficiency (WUE) as an indirect selection criterion. The study investigated the variability for Δ in improved F 7 lines and their parents (three cultivars and two mutant lines), which were sampled randomly from an F 6 nursery performing well under semi-dry conditions. In total, 40 entries were grown in sand culture, arranged in three-replicated randomized complete block designs in two sets of experiments in Antalya, Turkey. There were statistically significant differences (p
doi_str_mv 10.1080/10256010500230106
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Low coefficient of variation (C.V.) values, i.e. 2 and 1.65 %, for both data sets revealed efficient control of experimental error for Δ and indicated little effect of environment. Consequently, broad-sense heritability estimates for Δ were 0.63 and 0.74. As Δ showed a considerably high heritability and consistency over the two sets of experiments and low C.V. values, it was concluded that this trait could be used in breeding programmes aimed at developing drought tolerance lines. The early heading mutant, M-K-88, and the cultivar selected from land race, Tokak 157-37, showed lowest Δ values, indicating that they had the best water-use efficiency. 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subjects Aridity
Barley
Carbon Isotopes - analysis
Carbon-13
Genetic Techniques
Genetic Variation
Genotype
Heritability
Hordeum - genetics
Hordeum - growth & development
Hordeum vulgare
Mutant
Mutation
Natural abundances
Turkey
title Genotypic variability for carbon isotope discrimination in the mutant and improved lines of barley
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