| Registro completo |
| Provedor de dados: |
OAK
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| País: |
Japan
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| Título: |
Increased grain dormancy in white-grained wheat by introgression of preharvest sprouting tolerance QTLs
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| Autores: |
Kottearachchi, NS
Uchino, N.
Kato, Kiyoaki
Miura, Hideho
加藤, 清明
三浦, 秀穂
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| Data: |
2006-12
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| Ano: |
2006
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| Palavras-chave: |
Grain dormancy
Molecular marker
QTL
Triticum aestivum
White-grained wheat
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| Resumo: |
White-grained wheat cultivars have long been recognized to be less resistant to preharvest sprouting (PHS) than the red-grained ones. Previously two QTLs for grain dormancy, QPhs.ocs-3A.1 (QPhs-3AS) and QPhs.ocs-4A.1 (QPhs-4AL) were identified in a highly dormant Japanese red wheat, Zenkoujikomugi (Zen). Aiming at improvement of PHS tolerance in white-grained wheat, the introgression effect of these two QTLs in a white-grained population consisting of 40 recombinant inbred lines (RILs) developed from a cross between Zen and white-grained Spica was examined here. Random 20 RILs with red grains were also developed from the same cross and used as a control population. The RILs were grown in the field and in the glasshouse to evaluate the grain dormancy by germination test. Several SSR markers closely linked to the QPhs-3AS and QPhs-4AL were used to estimate the alleles at the QTLs. Dormancy variation in the RILs was significantly associated with the differences for grain color and the alleles at QPhs-3AS over several years. Although allelic variation was detected in a SSR marker closely linked to QPhs-4AL there was no difference in germination data between the Zen-allele and the Spica-allele groups. As expected, the red-grained RILs with the Zen allele at QPhs-3AS were the most dormant. Some white-grained RILs with the Zen allele at QPhs-3AS showed higher dormancy compared to the red-grained RILs with the alternative allele. These results demonstrated that introgression of the QPhs-3AS gene could contribute to the increased grain dormancy in white-grained wheat.
http://www.springerlink.com/openurl.asp?genre=journal&issn=0014-2336
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| Idioma: |
Inglês
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| Identificador: |
http://ir.obihiro.ac.jp/dspace/handle/10322/714
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| Editor: |
SPRINGER
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| Formato: |
application/pdf
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