Louis Et Al

Louis et al



Greener
Journal of  Agricultural Sciences

Vol. 3 (
2), pp.145-149,
February 2013


 ISSN: 2276-7770 



Research

Paper

Manuscript
Number:120512317

DOI: http://dx.doi.org/10.15580/GJAS.2013.2.120512317

 



Combining Ability in Roselle Cultivars for Agronomic
Traits in Yola, Nigeria

 



1
S.J. Louis,

2
A.M. Kadams,

3*
S.Y. Simon and

4
S.G. Mohammed

 


1,2,3
Department
of Crop Production and Horticulture Modibbo Adama
University of Technology, 

P.M.B 2076, Yola, Nigeria.


4
Department
of Agronomy, Bayero University Kano, Nigeria

 


*
Corresponding
Author’s Email: jatutu24 @ gmail. com

Abstract:

Combining ability estimates of roselle cultivars were
studied in a 6 x 6 half diallel analysis. The results showed
significant entries, parents and crosses for all the traits
studied in the individual and also in the poolled analysis,
suggesting that roselle populations were highly variable for
all the traits and therefore would most likely respond to
selection. Significant GCA and SCA variances were also
obtained in all the traits, implying that both the additive
and non-additive gene effects were operating in the genetic
expression of the traits. The non-additive gene effect was
however greater in magnitude as shown by the δ2 GCA/δ2 SCA
ratios, which were all less than unity. The combining
ability analysis of parents also revealed that Gerio-AB3,
Bazza-AB2 and Bazza-AB1 yielded consistently higher general
combining ability effect for most of the traits, indicating
that their crosses should produce desirable segregates for
the improvement of calyx yield of roselle. SCA effects
identified Bazza-AB2 x Gerio-AB2, Bazza-AB1 x Gerio-AB3 and
Bazza-AB1 x Michika-AB1 as the best crosses.
 
Keywords: Hibiscus sabdariffa, combining ability,
Gene effect.

Reference:


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