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Protein content and HvNAM alleles in Nordic barley (Hordeum vulgare) during a century of breeding

Hagenblad, Jenny and Vanhala, Tytti and Madhavan, Sharmila and Leino, Matti W. (2022). Protein content and HvNAM alleles in Nordic barley (Hordeum vulgare) during a century of breeding. HEREDITAS. 159 :1 , 12
[Research article]

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Abstract

Background Barley has been bred for more than a century in the Nordic countries, with dramatic improvements of yield traits. In this study we investigate if this has come at the cost of lower grain protein and micronutrient (iron, zinc) content, by analysing 80 accessions representing four different improvement stages. We further re-sequenced the two grain protein content associated genes HvNAM-1 and HvNAM-2 in full and performed expression analyses of the same genes to search for genetic associations with nutrient content. Results We found higher thousand grain weight in barley landraces and in accessions from the late improvement group compared to accessions from the mid of the twentieth century. Straw length was much reduced in late stage accessions. No significant temporal decrease in grain protein, iron or zinc content during twentieth century Nordic crop improvement could be detected. Out of the 80 accessions only two deviant HvNAM-1 sequences were found, represented by one accession each. These do not appear to be correlated to grain protein content. The sequence of HvNAM-2 was invariable in all accessions and no correlations between expression levels of HvNAM-1 and HvNAM-2 and with grain protein content was found. Conclusions In contrast to studies in wheat, where a strong negative correlation between straw length and grain protein and micronutrient content has been found, we do not see this relationship in Nordic barley. The last 60 years of breeding has reduced straw length but, contrary to expectations, not protein and micronutrient content. Variation in grain protein and micronutrient content was found among the Nordic barley accessions, but it is not explained by variation of HvNAM genes. This means that HvNAM is an unexploited source of genetic variation for nutrient content in Nordic barley.

Authors/Creators:Hagenblad, Jenny and Vanhala, Tytti and Madhavan, Sharmila and Leino, Matti W.
Title:Protein content and HvNAM alleles in Nordic barley (Hordeum vulgare) during a century of breeding
Series Name/Journal:HEREDITAS
Year of publishing :2022
Volume:159
Number:1
Article number:12
Number of Pages:13
Publisher:BMC
ISSN:1601-5223
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:HvNAM, Resequencing, Grain protein content, Hordeum vulgare, Crop improvement
URN:NBN:urn:nbn:se:slu:epsilon-p-116165
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116165
Additional ID:
Type of IDID
DOI10.1186/s41065-022-00227-y
Web of Science (WoS)000748411600001
ID Code:27184
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Breeding and Genetics
Deposited By: SLUpub Connector
Deposited On:23 Feb 2022 11:25
Metadata Last Modified:23 Feb 2022 11:31

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