Genetic parameters estimated from generation means in four diallel sets of maize inbreds

Genetic analysis of maturity and flowering characteristics in maize (Zea mays L.)

“…Partial dominance genetic effects [35] and over dominance gene action [26] in governing inheritance of days to silk in maize have been reported. The epistatic effects in controlling the inheritance of days to silk in maize are in agreement with the results obtained in earlier investigations [8,13,31] . However, additive genetic effects in explaining the genetic variability for days to silking in maize have been reported [4,6,9,10,33] .…”

“…The additive and additive x additive genetic effects for ASI is indicative of a good potential in the improvement of this trait. These results were in line with those of a generation mean analysis study on eight maize inbred lines where the inheritance of interval between anthesis and silking were controlled by recessive genes with prominent additive effects [31] .…”

“…The presence of epistasis is mostly indicative of greater genetic diversity in the parents. The findings that the dominance effects seemed to be the most substantial in the inheritance of days to silk concurred with other conclusions [31] . Partial dominance genetic effects [35] and over dominance gene action [26] in governing inheritance of days to silk in maize have been reported.…”

Selection among and within full-sib families for the development of single crosses in maize (Zea mays L.)

“…Epistatic effects, particularly of additive x additive and additive x dominance types, were con sidered to be more important than additive effects. Similar results were reported by Darrah and Hallauer (1972) were inconsistent over years. Sprague et al (1962) made all possible single and three-way crosses, disregarding reciprocals, among six inbred lines then in commercial use.…”

Variabilité génétique en croisement intra- et interpopulation dans deux populations de maïs fourrage

“…La population de référence est soit la population croisée avec elle-même (croisement intrapopulation), soit la population croisée avec une autre population (croisement interpopulation) (Hallauer & Miranda, 1981). Mais (Gallais et al, 1983 (Darrah & Hallauer, 1972;Moreno-Gonzalez & Dudley, 1981;Hébert, 1986;Melchinger ef al., 1986 (Gallais, 1978a). L'hypothèse d'absence d'effets réciproques est elle aussi justifiée pour les caractères étudiés (Melchinger et al, 1985;Hébert, 1986).…”