Effect of Advanced Cycle Breeding on Genetic Gain and Phenotypic Diversity in Barley Breeding Germplasm

Condón, Federico; Rasmusson, D. C.; Schiefelbein, Edward L; Velasquez, Guillermo; Smith, Kevin P.

doi:10.2135/cropsci2008.10.0585

Cited by 19 publications

(29 citation statements)

References 34 publications

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“…It was reported (Martin et al, 1991;Condon et al, 2009) that traits like GY and DH are close to the target values. However, we still believe that drought tolerance and winter hardiness shoul d be used for genetic improvement and will benefit from additional genetic diversity.…”

Section: Genotypic Selectionmentioning

confidence: 78%

“…studies within breeding programs can be used to assess the success of plant breeding strategies and their effects on the variation within breeding populations as a response to selection (Condon et al, 2009).…”

Section: Genotypic Selectionmentioning

confidence: 99%

“…It has been noted that in crops with a long history of improvement, the genetic gap between the improved and unimproved pools is growing larger with each breeding cycle (Holley and Goodman, 1988;Martin et al, 1991). While the selection strategy may determine the rate of gain, it is the genetic variation within the breeding population and the number of recombinants generated that determine the potential gain that can be realized with optimal selection (Condon et al, 2009). Genetic gains are used to compare different breeding strategies in terms of changes in traits among released cultivars and associated economic impact in a given region.…”

Section: Introductionmentioning

confidence: 99%

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Genetic variation in winter barley and selection of high yielding lines

Al-Yassin

Singh

Baum

2015

IJARe

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Barley (Hordeum vulgare L.) is an important crop with excellent nutritious feed and food grain. Winter barley, in particular, is predominantly grown in highland under rainfed systems due to its ability to tolerate cold. However, it has low productivity due to complex genetic mechanisms and limitations in determining an optimal environment for its selection and evaluation. This study evaluated the genetic variability, heritability and genetic gain for yield in barley, using preliminary un-replicated yield trials in 2011 at two locations and followed by replicated sets of yield trials in 2012, all in Syria. Significant genotypic variability was found at both stages of the evaluation/selection. During 2011, the best linear unbiased predictor means of test genotypes adjusted for spatial variability were found in the range of 1.75-3.75 t/ha at Tel Hadya and 0.03-1.58 t/ha at Breda. A set of 22 advanced yield trials comprising a total of 601 lines at Tel Hadya in 2012 yielded in the range of 1.85-3.13 t/ha. Based on the mean over these set of trials, the highest heritable trait was days to heading (broad-sense heritability on mean-basis= 0.64) followed by yield (the heritability = 0.30). The yield gain due to selection, at 20% intensity of selection, was 5.66% at Tel Hadya and 27.1% at Breda in 2011 using un-replicated genetic material, while it was 7.01 % for the replicated trials at Tel Hadya in 2012. We recommend use of the best lines selected in 2012 at Tel Hadya for further exploitation in genotype × environment interaction studies for high yield and specific and broad adaptation.

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Section: Genotypic Selectionmentioning

confidence: 78%

Section: Genotypic Selectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Genetic variation in winter barley and selection of high yielding lines

Al-Yassin

Singh

Baum

2015

IJARe

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“…The Closed panel comprises lines from the advanced cycle breeding program (elite × elite) with a relatively closed pedigree, i.e. , few new founders were introduced after 1958 when the strategy was initiated (Condón et al 2008; Condón et al 2009). The Reopened panel comprises lines from families derived from the introduction of 13 new donors to the Closed population in response to the FHB epidemic (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…The prevalence and spread of this pathogen increased in the Midwestern United States in the early 1990s (McMullen et al 1997) and revealed limited genetic variation for disease resistance among existing barley cultivars and the need to introduce novel variation for resistance into breeding programs. During the 35 years preceding the FHB outbreak, the University of Minnesota barley breeding program made use of relatively closed pedigrees in an advanced cycle breeding scheme (Rasmusson and Phillips 1997) that primarily focused on crosses among elite lines from within the breeding population (Condón et al 2009). After the outbreak, numerous exotic sources of elite lines with known FHB resistance and reduced deoxynivalenol (DON) mycotoxin (which is produced by the pathogen) concentration were evaluated and introduced as parents in the breeding population to enhance FHB resistance (Smith et al 2013).…”

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confidence: 99%

Comparative Analyses Identify the Contributions of Exotic Donors to Disease Resistance in a Barley Experimental Population

Fang

Eule-Nashoba

Powers

et al. 2013

G3 Genes|Genomes|Genetics

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Introgression of novel genetic variation into breeding populations is frequently required to facilitate response to new abiotic or biotic pressure. This is particularly true for the introduction of host pathogen resistance in plant breeding. However, the number and genomic location of loci contributed by donor parents are often unknown, complicating efforts to recover desired agronomic phenotypes. We examined allele frequency differentiation in an experimental barley breeding population subject to introgression and subsequent selection for Fusarium head blight resistance. Allele frequency differentiation between the experimental population and the base population identified three primary genomic regions putatively subject to selection for resistance. All three genomic regions have been previously identified by quantitative trait locus (QTL) and association mapping. Based on the degree of identity-by-state relative to donor parents, putative donors of resistance alleles were also identified. The successful application of comparative population genetic approaches in this barley breeding experiment suggests that the approach could be applied to other breeding populations that have undergone defined breeding and selection histories, with the potential to provide valuable information for genetic improvement.

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Genetic parameters and morpho-agronomic characterization of barley in the Brazilian Savannah

et al. 2018

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There is a growing demand for malting barley in the world and the supply relies on introducing the crop into new agricultural regions, such as the Brazilian Savannah. This requires selection for high yield and seed quality, critical factors for the success of commercial production. This study aimed at estimating genetic parameters associated with morpho‐agronomic characterization of 433 preliminarily selected accessions from a worldwide barley collection. The accessions were grown on a limed and fertilized Haplustox soil, using interpolated control experimental design, in the Savannah highlands, in Brazil. High‐magnitude heritability and genetic variation coefficients were found for agronomic traits, allowing the identification of genotypes for crossing schemes to generate high‐yield recombinants. Strong negative correlation between yield and number of days to heading and protein content indicated that selection should be directed at early‐maturity cultivars with desirable malting quality. The method proved efficient and revealed interesting indicators to be considered in barley breeding programmes directed at high‐quality malting production in the tropics. Copyright © 2018 The Institute of Brewing & Distilling

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Effect of Advanced Cycle Breeding on Genetic Gain and Phenotypic Diversity in Barley Breeding Germplasm

Abstract: Abbreviations: QTL, quantitative trait locus; SSR, simple sequence repeat.

Cited by 19 publications

References 34 publications

Genetic variation in winter barley and selection of high yielding lines

Genetic variation in winter barley and selection of high yielding lines

Comparative Analyses Identify the Contributions of Exotic Donors to Disease Resistance in a Barley Experimental Population

Genetic parameters and morpho-agronomic characterization of barley in the Brazilian Savannah

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