Effects of the Dt2 and S alleles on agronomic traits of F1 hybrid soybean

Agronomic evaluation of F1 hybrid soybean [Glycine max (L.) Merr.] will be useful for germplasm evaluation, recurrent selection, and estimating heterosis. We anticipated that vegetative heterosis, commonly observed in soybean, could increase early lodging and pod abortion, reducing grain yield. Unde...

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Bibliographic Details
Published in:Crop science 1998-09, Vol.38 (5), p.1137-1142
Main Authors: Lewers, K.S. (USDA-ARS-SARL, BARC-W, Beltsville, MD.), St Martin, S.K, Hedges, B.R, Palmer, R.G
Format: Article
Language:English
Subjects:
ABORTION (PLANTS)
Agricultural production
AGRONOMIC CHARACTERS
Agronomy. Soil science and plant productions
ALTURA
Biological and medical sciences
Breeding schemes. Varia
CARACTERE AGRONOMIQUE
CARACTERISTICAS AGRONOMICAS
CONTENIDO PROTEICO
CRECIMIENTO
CROISSANCE
CROP YIELD
DETERMINATE AND INDETERMINATE HABIT
DEVELOPMENTAL STAGES
ENCAMADO
ENTRE NOEUD
ESPACEMENT
ESPACIAMIENTO
ETAPAS DE DESARROLLO
EVALUACION
EVALUATION
FRUIT
FRUTO
Fundamental and applied biological sciences. Psychology
GENE
GENES
Genetic aspects
Genetics
Genetics and breeding of economic plants
GERMOPLASMA
GERMPLASM
GLYCINE MAX
GROWTH
HABITOS DE CRECIMIENTO
HARVEST INDEX
HAUTEUR
HEIGHT
HETEROSIS
HIBRIDOS
HYBRID VARIETIES
HYBRIDE
Hybridization
HYBRIDS
INBRED LINES
INDICE DE COSECHA
INDICE DE RECOLTE
INTERNODES
INTERNODIOS
LARGURA
LENGTH
LIGNEE CONSANGUINE
LINEAS CONSANGUINEAS
LODGING
LONGUEUR
MADURACION
MATURATION
MAXIMUM YIELD
Observations
ONTARIO
PESO DE LAS SEMILLAS
Plant breeding: fundamental aspects and methodology
PLANT HABIT
PODS
POIDS DES SEMENCES
PORT DE LA PLANTE
PROTEIN CONTENT
RECURRENT SELECTION
RENDEMENT
RENDEMENT DES CULTURES
RENDIMIENTO
RENDIMIENTO DE CULTIVOS
ROW SPACING
SEED WEIGHT
SELECCION
SELECCION RECURRENTE
SELECTION
SELECTION PROGRAM
SELECTION RECURRENTE
Soybean
Soybeans
SPACING
STADE DE DEVELOPPEMENT
STEMS
TALLO
TENEUR EN PROTEINES
TIGE
VERSE
VIGOR HIBRIDO
VIGUEUR HYBRIDE
YIELDS
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Summary:Agronomic evaluation of F1 hybrid soybean [Glycine max (L.) Merr.] will be useful for germplasm evaluation, recurrent selection, and estimating heterosis. We anticipated that vegetative heterosis, commonly observed in soybean, could increase early lodging and pod abortion, reducing grain yield. Under these circumstances, observed hybrid grain yield would not reflect the true potential of the hybrid as expressed in later generations. The Dt2 (semideterminate stem type) and S (short internode stem type) alleles have been shown to reduce excessive vegetative growth and lodging in narrow-row production of inbred soybean. Our objectives were (i) to determine the per se effects and effects on heterosis, for agronomic traits, of the semideterminate (Dt2-) and short (S-) stem types in hybrid soybean, (ii) to assess their potential in facilitating germplasm evaluation and recurrent selection, and (iii) to determine if either stem type would be agronomically desirable in commercial hybrid soybean production. Near-isogenic inbred lines and hybrid (F1) lines were evaluated in replicated three-row plots. The Dt2 and S alleles affected agronomic traits of hybrids and inbreds similarly. The Dt2 and S alleles hastened maturity, decreased plant height and lodging, and increased harvest index per se values. The Dt2 allele decreased seed weight and protein content. Both the per se and heterosis data suggest that the Dt2 and S alleles would not be consistently beneficial to germplasm evaluation or recurrent selection. The per se data suggest that the S allele might be useful for both inbred and commercial hybrid soybean
ISSN:0011-183X
1435-0653
DOI:10.2135/cropsci1998.0011183X003800050005x