Early maturing spring wheat in Nordic wildtype NAM-B1 germplasm for short-duration alternative wheat-producing regions
| Autor: | Mingchu Zhang, Steven R. Lyon, Bethany F. Econopouly, David W. Killilea, Bob M. Van Veldhuizen, Stephen S. Jones |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Germplasm Senescence geography geography.geographical_feature_category business.industry 04 agricultural and veterinary sciences Plant Science Biology 01 natural sciences Agronomy Agriculture High latitude Spring (hydrology) 040103 agronomy & agriculture Genetics 0401 agriculture forestry and fisheries Grain yield business Agronomy and Crop Science Cropping Short duration 010606 plant biology & botany |
| Zdroj: | Plant Genetic Resources: Characterization and Utilization. 17:352-361 |
| ISSN: | 1479-263X 1479-2621 |
| DOI: | 10.1017/s147926211900011x |
| Popis: | In the USA, western Washington (WWA) and the Alaska (AK) Interior are two regions where maritime and continental climates, high latitude and cropping systems necessitate early maturing spring wheat (Triticum aestivum L.). Both regions aim to increase the production of hard spring bread wheat for human consumption to support regional agriculture and food systems. The Nordic region of Europe has a history of breeding for early maturing spring wheat and also experiences long daylengths with mixed maritime and continental climates. Nordic wheat also carries wildtype (wt) NAM-B1, an allele associated with accelerated senescence and increased grain protein and micronutrient content, at a higher frequency than global germplasm. Time to senescence, yield, protein and mineral content were evaluated on 42 accessions of Nordic hard red spring wheat containing wt NAM-B1 over 2 years on experimental stations in WWA and the AK Interior. Significant variation was found by location and accession for time to senescence, suggesting potential parental lines for breeding programmes targeting early maturity. Additionally, multiple regression analysis showed that decreased time to senescence correlated negatively with grain yield and positively with grain protein, iron and zinc content. Breeding for early maturity in these regions will need to account for this potential trade-off in yield. Nordic wt NAM-B1 accessions with early senescence yet with yields similar to regional checks are reported. Collaboration among alternative wheat regions can aid in germplasm exchange and varietal development as shown here for the early maturing trait. |
| Databáze: | OpenAIRE |
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