High positive estimates of specific
combining ability in absolute values indicates
that hybrid performance is relatively superior or
inferior to parent lines general combining
ability, showing the importance of non-additive
interactions resulting from the complementation
degree among parent lines in relation to
frequency of alleles in loci with some
dominance, while low estimates of specific
combining ability in absolute value indicates that
hybrids behave as expected in relation to general
combining ability of parent lines (Vencovsky
and Barriga, 1992). In the selection of parent
lines used to produce hybrids, the effect of a
specific combining ability analyzed in an
isolated way has a limiting value. Thus, other
parameters should be considered such as the
average of hybrids and general combining ability
of the respective parent lines (Oliveira et al.,
1998). Therefore, superior hybrid combinations,
which are important for breeding, are involved
with at least one parental line which has the
most favorable effects of general combining
ability (Cruz and Regazzi, 1997). Thus, it is
possible to analyze the 2 hybrids that showed
high performance for most of the yield and
quality traits, such as FDM 37 x FDM 14 and
FDM 7 x FDM 14 (Table 4).
High positive estimates of specificcombining ability in absolute values indicatesthat hybrid performance is relatively superior orinferior to parent lines general combiningability, showing the importance of non-additiveinteractions resulting from the complementationdegree among parent lines in relation tofrequency of alleles in loci with somedominance, while low estimates of specificcombining ability in absolute value indicates thathybrids behave as expected in relation to generalcombining ability of parent lines (Vencovskyand Barriga, 1992). In the selection of parentlines used to produce hybrids, the effect of aspecific combining ability analyzed in anisolated way has a limiting value. Thus, otherparameters should be considered such as theaverage of hybrids and general combining abilityof the respective parent lines (Oliveira et al.,1998). Therefore, superior hybrid combinations,which are important for breeding, are involvedwith at least one parental line which has themost favorable effects of general combiningability (Cruz and Regazzi, 1997). Thus, it ispossible to analyze the 2 hybrids that showedhigh performance for most of the yield andquality traits, such as FDM 37 x FDM 14 andFDM 7 x FDM 14 (Table 4).
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