Barley (Hordeum vulgare L.) Breeding

El-Hashash, E. F.; El-Absy, Karima Mohamed

doi:10.1007/978-3-030-23108-8_1

Cited by 24 publications

(26 citation statements)

References 124 publications

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“…Barley wild relatives could be a source of desirable traits associated with abiotic stress tolerance, which might be exploited in conventional breeding programmes (Bahrami et al, 2019; Barati et al, 2019; Ebrahim et al, 2020). Using hybridization between wild and domesticated barley provides more genetic variation to improve abiotic stress adaptability in cultivated genotypes (El‐Hashash & El‐Absy, 2019). In the current study, a wide range of variation was observed among F 3 and BC 1 F 2 families for agronomical and physiological traits.…”

Section: Discussionmentioning

confidence: 99%

Tolerance to high temperature at reproductive stage: Trade‐offs between phenology, grain yield and yield‐related traits in wild and cultivated barleys

2021

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High‐temperature stress at the reproductive stage poses a substantial constraint on cereal production worldwide. This study was conducted to assess tolerance to terminal high‐temperature stress in 45 wild (Hordeum vulgare ssp. spontaneum) genotypes, four cultivars (H. vulgare ssp. vulgare), 98 F3 and 79 BC1F2 families derived from hybridization of a high‐temperature tolerant wild genotype and a susceptible cultivar ‘Mona’. Results of analysis of variance showed significant genotypic and high‐temperature stress effects on all the traits studied. Approximately one quarter of the wild genotypes originating from a warmer climate were slightly affected by high‐temperature stress. Grain yield strongly correlated (p < .01) with stress tolerance, yield stability and heat tolerance indices. The reduction in the reproduction period caused by high temperature was much higher in cultivated genotypes than in wild ones. Grain number and weight were the most effective yield components to screen high‐temperature tolerant F3 and BC1F2 families. In conclusion, strategies like escape/avoidance are being used primarily to cope with heat stress by cultivars, whereas adaptive strategies such as tolerance are being implemented by wild barley.

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Section: Discussionmentioning

confidence: 99%

Tolerance to high temperature at reproductive stage: Trade‐offs between phenology, grain yield and yield‐related traits in wild and cultivated barleys

2021

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“…Barley wild relatives could be a source of desirable traits associated with abiotic stress tolerance, which might be exploited in conventional breeding programs (Bahrami et al, 2019; Baratiet al, 2019; Ebrahim et al, 2020). Using hybridization between wild and domesticated barley provides more genetic variation to improve abiotic stress adaptability in cultivated genotypes (El-Hashash & El-Absy, 2019). In the current study, the wide range of variation observed among F3 and BC1F2 families for agronomic and physiological traits.…”

Section: Discussionmentioning

confidence: 99%

A novel tolerance index to identify heat tolerance in cultivated and wild barley genotypes

Bahrami

Arzani

Rahimmalek

2020

Preprint

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Thermal stress at the reproductive stage poses a substantial constraint on cereal production worldwide. A two-year field study was conducted to assess tolerance to terminal heat stress in cultivated (Hordeum vulgare ssp. vulgare L.) and wild (H. vulgare ssp. spontaneum L.) barley genotypes using phenological and agronomic traits as well as selection indices based on grain yield. A new heat-tolerance index was tested while a simultaneous study was also carried out of both phenological and grain yield-related variables as well as previously defined indices. Results of analysis of variance showed the significant genotypic and high-temperature stress (environment) effects on all the traits studied. In contrast to the cultivated genotypes, the wild ones were found less affected by high-temperature stress. Moreover, both cultivated and wild genotypes were observed to use the life cycle shortening as a mechanism to evade heat stress. In addition, supplementary tolerance mechanisms were also found likely to contribute to heatstress evasion in the wild germplasm. Grain yield showed a strong relationship with both stress tolerance index (STI) and heat tolerance index (HTI) among the wild genotypes. However, multivariate analysis highlighted the feasibility of HTI to screen high-temperature tolerant wild genotypes under harsh environments with the most high-temperature tolerant wild genotypes identified originating from warm climates.

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“…The method allows for the production of 3 to 9 breeding generations per year. This is ideal for accelerated breeding and population evaluation across the target production environments involving various selection methods such as SSD, SPD and SPS (El‐Hashash & El‐Absy, 2019).…”

Section: Opportunities Of Speed Breeding Techniquesmentioning

confidence: 99%

Opportunities and challenges of speed breeding: A review

et al. 2021

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Breeding new and high performing cultivars with market-preferred traits take more than 10 years in the absence of an integrated pre-breeding programme. During the early phases of breeding a significant amount of time, space and resources are invested in the selection and genetic advancement stages after initial crosses are performed with parental genotypes. Speed breeding has the potential to reduce the time required for cultivar development, release and commercialization. The objective of this review was to present the key opportunities and challenges of speed breeding to guide pre-breeding and breeding programmes. Key challenges of speed breeding include: (a) access to suitable facilities, (c) staff trained in the protocol, (b) adopting major changes to breeding programme design and operations, and (d) the need for long-term funding. The current review highlights the potential advantages of speed breeding for the successful development and release of pure line cultivars in selfpollinated crops in ~5 years versus 8 to 10 years when using traditional methods.

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Barley (Hordeum vulgare L.) Breeding

Cited by 24 publications

References 124 publications

Tolerance to high temperature at reproductive stage: Trade‐offs between phenology, grain yield and yield‐related traits in wild and cultivated barleys

Tolerance to high temperature at reproductive stage: Trade‐offs between phenology, grain yield and yield‐related traits in wild and cultivated barleys

A novel tolerance index to identify heat tolerance in cultivated and wild barley genotypes

Opportunities and challenges of speed breeding: A review

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