Effect of allele combinations at Ppd‐1 loci on durum wheat grain filling at contrasting latitudes
| Autor: | Karim Ammar, Jose M. Arjona, Dolors Villegas, Conxita Royo, Joan Subira, Susanne Dreisigacker |
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| Přispěvatelé: | Producció Vegetal, Cultius Extensius Sostenibles |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
photoperiodism Developmental stage Wheat grain food and beverages 04 agricultural and veterinary sciences Plant Science Grain filling Biology Flowering time 01 natural sciences Latitude Grain weight Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Allele Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | IRTA Pubpro. Open Digital Archive Institut de Recerca i Tecnologia Agroalimentàries (IRTA) |
| Popis: | Flowering time is the most critical developmental stage in wheat, as it determines environmental conditions during grain filling. Thirty‐five spring durum genotypes carrying all known allele variants at P p d ‐1 loci were evaluated in fully irrigated field experiments for three years at latitudes of 41°N (Spain), 27°N (northern Mexico) and 19°N (southern Mexico). Relationships between weight of central grains of main spikes (W) and thermal time from flowering to maturity were described by a logis‐tic equation. Differences in flowering time between the allele combination causing the earliest (GS100/Ppd‐B1a) and the latest (Ppd‐A1b/Ppd‐B1a) flowering were 7, 20 and 18 days in Spain, northern Mexico and southern Mexico, respectively. Flowering delay drastically reduced the mean grain filling rate (R) and W at all sites. At autumn‐sowing sites, an increase of 1°C in mean temperature during the first half of the grain filling period decreased W by 5.2 mg per grain. At these sites, W was strongly dependent on R. At the spring‐sowing site (southern Mexico), W depended on both Rand grain filling duration. Our results suggest that incorporating the allele combina‐tions GS100/Ppd‐B1a and GS105/Ppd‐B1a (alleles conferring photoperiod insensitiv‐ity) in newly released varieties can reduce the negative effects of climate change on grain filling at the studied latitudes info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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