Kernel weight in maize: genetic control of its physiological and compositional determinants in a dent x flint-caribbean RIL population
| Autor: | Mandolino, Cecilia I., D'Andrea, Karina E., Piedra, Carlina V., Alvarez Prado, Santiago, Olmos, Sofia E., Cirilo, Alfredo G., Otegui, Maria E. |
|---|---|
| Přispěvatelé: | Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET), Instituto Nacional de Tecnología Agropecuaria, Departamento de Producción Vegetal, Facultad de Agronomía, University of Buenos Aires, Écophysiologie des Plantes sous Stress environnementaux (LEPSE), Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), National Agency for Science Promotion of Argentina (PICT 0239 and 1454), University of Buenos Aires (UBACYTs 00454 and 00493), National Council of Research (CONICET)., Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
héritabilité
maïs qtl Biologie du développement food and beverages heritability maize Development Biology grain de maïs maize kernel weight kernel growth rate kernel filling duration protein concentration quantitative trait loci corrélation phénotypique remplissage du grain seed filling teneur en protéines du grain [SDV.BDD]Life Sciences [q-bio]/Development Biology contrôle génétique |
| Zdroj: | Maydica Maydica, 2016, 61 (4) Maydica 4 (61), . (2016) |
| ISSN: | 0025-6153 |
| Popis: | The genetic control of maize kernel weight (KW) determination could be studied through its physiological and/ or compositional determinants. Our objective was to dissect the genetic control of maize KW by analyzing its physiological (KGR: kernel growth rate; KFD: kernel filling duration) and compositional (protein, oil, starch) determinants in a dentxflint Caribbean RIL population, which combines a broad genetic background with grains of high added value for industry. An additional objective was to determine the stability of the genetic control under contrasting growing conditions, for which soil nitrogen offer was modified across experiments. Heritability (H-2) values were high for KW (H-2 = 0.74) and intermediate for the other traits (from 0.62 to 0.42). Kernel weight had a strong correlation with KFD (r = 0.69), KGR (r = 0.60) and protein concentration (r = 0.56). Ten joint QTL with inconsistent effects across years and seven epistatic interactions were detected. Despite changes in effect size, most QTL were significant under both environments. Nine QTL were associated with variations in potential KW (KWP), mean KW, KGR and oil concentration, eight with variations in protein and starch concentration and seven with KFD. Epistatic interactions were related to regions with significant main effects. The most important finding was the existence of a common QTL for KWP, KGR and KFD on chromosome 5, for which there was no previous report. Results increased our knowledge on the genetic control of KW through its phenotypic and genetic correlation with KFD, confirming the need to explore different physiological strategies in different genetic backgrounds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|