AJPS  Vol.6 No.7 , April 2015
Heterosis and Combing Ability in F1 Population of Hexaploid Wheat (Triticum Aestivum L.)
The heterosis, heterobeltiosis, general combining ability (GCA) and specific combining ability (SCA) were examined during Rabi (crop season) of 2013-2014 in hexaploid wheat genotypes. The experiment for this study was conducted at the Botanical Garden, Department of Plant Breeding & Genetics, Sindh Agriculture University Tandojam, Pakistan. The breeding material was comprised of four parents (Imdad, TD-1, SKD-1, and Moomal). These parents were crossed in half partial mating fashion; thus, six possible cross combinations (F1s) were obtained (Imdad × TD-1, Imdad × SKD-1, Imdad × Moomal, TD-1 × SKD-1, TD-1 × Moomal, and SKD-1 × Moomal). A three-replicated RCB Design was used. The mean squares corresponding to different traits of various hexaploid wheat genotypes indicated significant (P < 0.01) GCA (parents) and SCA (F1 hybrids) effects for the characters (plant height, tillers plant-1, spike length, spikelets spike-1, seeds spike-1, seed index, and grain yield plant-1). The mean performance of F1 hybrids differed significantly (P < 0.01) for all the traits studied. Among the parents, Imdad and TD-1 proved to be better general combiners for almost all the studied traits. In regards to SCA effects, the F1 hybrids Imdad × TD-1 and Imdad × SKD-1 expressed higher SCA and heterotic effects for most of the studied traits.

Cite this paper
Kalhoro, F. , Rajpar, A. , Kalhoro, S. , Mahar, A. , Ali, A. , Otho, S. , Soomro, R. , Ali, F. and Baloch, Z. (2015) Heterosis and Combing Ability in F1 Population of Hexaploid Wheat (Triticum Aestivum L.). American Journal of Plant Sciences, 6, 1011-1026. doi: 10.4236/ajps.2015.67107.
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