Heterosis and combining ability of seed physiological quality traits of single cross vs. three-way sorghum hybrids
No hay miniatura disponible
Fecha
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidade Estadual de Maringá
Resumen
Descripción
The aim of this research was to compare gene tic parameters for traits related with seed germination and seedling vigour of single cross (SCH) vs . three-way (TWH) sorghum hybrids. The study was conducted in a sand bed under a greenhouse; 67 genoty pes (four pairs of A- and B- lines, four R- lines, 13 SCH and 42 TWH) were allocated in a randomized complete blocks experimental design with three replications. Statistical analysis included ANOV A’s and Student “t” tests, while Tukey test (p ≤ 0.05) was applied for mean comparisons. The R-lines showed bette r physiological seed qualit y attributes than the A- and B- lines. The seed quality and heterosis values of SCH vs. that of TWH did not show significant differences (p > 0.05) for any variable; however, hete robeltiosis of SCH was higher than that of TWY for normal seedlings, dry weight of plumule and seedli ng emergence rate. The A2- line and R14 restorer line showed the highest GCA values in both types of hybrids. No differences (p ≤ 0.05) were found between maternal and paternal effects of the A- and B- lines in volved in the male sterile cross (female parent) of the TWH, except for plumule length in Line 5.
Palabras clave
Agrociencias