Heterotic Effect, Combining Ability and Significance of Synthetics over Line Cultivars in Faba Bean (Vicia faba L.) Grown under Semi-Arid Zones ()
ABSTRACT
The aim
of this study was to investigate the amount of heterosis and performance of
faba bean synthetic cultivars compared to line cultivars under semi-arid
conditions. Five inbred lines in at least S6 generation were
developed and used to develop F1s
hybrid (in all possible combination excluding reciprocal), lines mixtures (Syn-0) and synthetic generations of Syn-1.
Evaluation of the entries showed the lines to have high general and specific combining
ability, high yield and high average degree of cross-fertilization (0.36);
hetrosis relative to mid-parent for yield was 67%. Lines mixture from four
inbred lines (Hudeiba/93, Bassabier, Ed-Damar and Shabah) gave the highest
yield of 3.40 t/ha for Syn-0 and 3.96 t/ha for Syn-1. Compared to the average
yield t/ha of the pure stand of the four lines (3.11 t/ha), the increase in yield of was 9% in sy-0 and
27% in Syn-1. Compared to the
individual yield t/ha of the pure stand of
the lines, the performance of Syn-0 surpassed that of the individual
pure stands of the linesby 14% for Hudiaba/93 and Bassabier and 4% for Ed-Damar
and 7% for Shabah, whereas the increase in performance of Syn-1 compared to
pure stand of the lines was 32%, 25% and 21%, respectively. The results confirm the previous
knowledge on yield increase with successive syn-generations in faba bean due to
the effects of heterogeneity and heterozygosity. Such results could be used as
a base for an effective breeding program for improvement of yield of faba bean
grown under the semi-arid zones.
Share and Cite:
Gasim, S. and Mohamed, A. (2018) Heterotic Effect, Combining Ability and Significance of Synthetics over Line Cultivars in Faba Bean (
Vicia faba L.) Grown under Semi-Arid Zones.
American Journal of Plant Sciences,
9, 2684-2695. doi:
10.4236/ajps.2018.913195.