Relationship Between Hardness Genes and Quality in Barley (Hordeum vulgare)

Fox, Glen; Nguyen, Linh T.; Bowman, J. G. P.; Poulsen, David Me; Inkerman, P Andrew; Henry, Robert J.

doi:10.1002/j.2050-0416.2007.tb00261.x

Cited by 28 publications

(19 citation statements)

References 21 publications

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“…In this group of 81 spring barleys consisting of 73 USDA‐ARS National Small Grains Collection accessions selected for divergent DMD and eight modern cultivars, a large degree of sequence variation in Hina , Hinb‐1 , Hinb‐2 , and Gsp was observed (Table 1). The level of diversity is perhaps similar to that reported previously in less diverse data sets (Beecher et al, 2001; Caldwell et al, 2006; Fox et al, 2007). Beecher et al (2001) found three Hina and two Hinb alleles among eight North American barley cultivars and mapped Hinb to the short arm of chromosome 5H in a Steptoe × Morex mapping population.…”

Section: Discussionsupporting

confidence: 87%

Hardness Locus Sequence Variation and Endosperm Texture in Spring Barley

et al. 2008

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The Hardness (Ha) locus contains the Hina, Hinb‐1, Hinb‐2, and Gsp genes and was shown to be associated with grain hardness and dry matter digestibility (DMD) variation. In this study, 73 spring barley (Hordeum vulgare L.) accessions selected for DMD variation were assessed for variation in DMD, seed quality, and Hardness (Ha) locus component gene alleles. To determine whether Ha is associated with grain quality traits, we assessed the relationship of the Ha locus in the presence or absence of head type (two or six row) variation. To accomplish this, the barley Ha locus component genes (Hina, Hinb‐1, Hinb‐2, and Gsp) were sequenced from each accession and sorted by prevalence. The most common Ha haplotype (HINA, HINB‐1, HINB‐2 alleles) was present in 42 accessions with the remaining 39 dispersed over 24 haplotypes. Seeds from two‐row accessions with the most common Ha haplotype were significantly softer in grain texture (P < 0.001) and had increased starch content (P < 0.001) and DMD (P < 0.05). We used quantitative reverse‐transcriptase polymerase chain reaction to measure Hina, Hinb‐1, Hinb‐2, and Gsp expression levels in developing seeds of 19 Ha locus haplotypes. The expression levels of all four genes were positively correlated with DMD. The results indicate that selection for individual Ha locus haplotypes may be useful in modifying seed size, DMD, and starch content in two‐row barley.

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Section: Discussionsupporting

confidence: 87%

Hardness Locus Sequence Variation and Endosperm Texture in Spring Barley

et al. 2008

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“…This FA model has been shown to perform well for these types of MET data [25][26][27][28][29] . This same statistical model was adopted for the feed grain traits.…”

Section: Malt Qualitymentioning

confidence: 91%

“…Recent studies have highlighted the benefits of using liner mixed models over traditional analysis of variance to calculate genetic and environmental effects for barley breeding data [25][26][27][28][29] . Using this mixed model analysis, we identified differences in genotypic responses across environments for the grain, malt and feed quality attributes measured in this study.…”

Section: Grain Qualitymentioning

confidence: 99%

“…• grain hardness 2,27,28,38,63,66,78 and • cell wall, protein and starch degrading enzyme levels in both resting grain and synthesised during malting 4,[12][13][14]43,44,50,64,80,81,83 . A second important trait that provides an early indication of malt potential is friability, although this is a relatively new method compared to the HWE method.…”

Section: Introductionmentioning

confidence: 99%

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Is Malting Barley Better Feed for Cattle than Feed Barley?

Fox

Kelly²,

Bowman

et al. 2009

Journal of the Institute of Brewing

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Barley grain from a combined intermediate and advanced barley breeding trial was assessed for grain, feed and malt quality from two sites over two consecutive years, with the objective to ascertain relationships between these traits. Results indicated there were genetic effects for both malt (hot water extract and friability) and "feed" traits (as measured by hardness, acid detergent fibre, starch and in-sacco dry matter digestibility). The feed trait values were generally independent of the malt trait values. However, there were positive relationships between friability, hardness and protein, as well as a negative relationship between extract and husk. Extract also had a positive relationship with test weight but appeared to be independent from the feed traits. Test weight also showed little relationship to the feed traits. Heritability values ranged from low to high for almost all traits. This study details where both malt and cattle feed parameters have been compared and the results indicated that while malt and feed traits do not correlate directly, malt cultivars can exhibit excellent feed characteristics, equal to or better than feed cultivars. This data highlights the benefit of selecting for malt quality even if a breeding program would be interested at targeting specific feed quality.

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“…It reflects a complicated correlation among the structural components of endosperm: starch, protein and b-glucan (Darlington et al, 2000). The quantitative trait locus (QTL), which is mainly responsible for the grain hardness trait, is found in the 7 th chromosome of the barley genome (Beecher et al, 2002), and is influenced by the genes hin a, hin b-1, and hin b-2 (Fox et al, 2007;Turuspekov et al, 2008). Grain hardness was observed to be relatively higher in barley genotypes with both high and low amylose content in grain (Jagtap et al, 1993).…”

Section: Traits Of Physical Grain Qualitymentioning

confidence: 99%

Grain quality traits important in feed barley

Bleidere¹,

Gaile²

2012

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

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Grain quality traits important in feed barley Spring barley (Hordeum vulgare L.) traditionally has been a major cereal crop for animal feed especially in Northern areas and also in Latvia. It is complicated to define what the ideal feed barley should be, as the requirements widely differ not only for different species, but even for different age groups of the same species of animals. Therefore, the breeding of feed barley has been developing very slowly and building on the basis of agronomic and beer barley quality parameters. Targeted breeding of barley varieties for a definite application purpose of the grain is connected with selection according to different criteria. The present article shows that the feed quality of barley is influenced both by physical grain quality indicators (colour, grain weight and size, hull content, 1000 grain weight, volume weight and grain hardness) and by the chemical composition (carbohydrates, non-starch polysaccharides, amino acids, fibre, protein, fat, minerals and vitamins). On the basis of the information collected, a profile of a high quality feed barley variety for different groups of animals is defined.

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Relationship Between Hardness Genes and Quality in Barley (Hordeum vulgare)

Cited by 28 publications

References 21 publications

Hardness Locus Sequence Variation and Endosperm Texture in Spring Barley

Hardness Locus Sequence Variation and Endosperm Texture in Spring Barley

Is Malting Barley Better Feed for Cattle than Feed Barley?

Grain quality traits important in feed barley

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