COMPARISON OF MATING .AM) SELECTION SCHEMES IN BREEDING FOR HIGHER PRODUCTIVITY IN CHICKPEA {Cicer arietinum L.)
Loading...
Date
2001-08-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE
Abstract
An investigation was carried out to compare the mating and selection
schemes in breeding for higher productivity in the cross ICCV-10 X BG-256 of
chickpea. For this purpose biparental mating (BIP) was attempted in F2 of this
cross to generate BIP population. At the same time, with selling, two breeding
bulks VIZ., selected bulk (SB) and random bulk (RB) were created by applying
appropriate standard selection procedures. Parents, Fi BIP SB RB and
check Annigeri were evaluated for yield and its important component traits in
the Botany garden of Agriculture College, Dharwad.
The mean values of BIP were higher than those of SB and RB for all the
characters under study. Mean value of BIP even exceeded the mean of F, for
all the characters except plant height and 100-seed weight. In general BIP
showed wider range in desirable direction. The magnitudes of genotypic' and
phenotypic variations were enhanced in BIP for all the characters except
secondary branches. Similarly, estimates of heritability and genetic advance
were also high in BIP for all the characters followed by that of SB and RB.
Biparental mating also resulted in shifts in the magnitude as well as the
direction of correlation co-efficients. Negative association of 100-seed weight
with seed yield was observed in SB and RB while it was positive and
significant in BIP. Similarly, negative association was observed between plant
height and 100-seed weight and pods per plant and 100-seed weight in SB
and RB which became positive though non-significant in BIP Altered
correlations indicated that intermating in F2 was effective in breaking some
undesirable linkages. The direct effects of pods per plant and 100-seed weight
as well as indirect effects of other traits through these two traits were positive
but low in selfs while they were higher in BIP.
In general, BIP population showed higher frequency of Lransgressive
segregants followed by SB and RB for individual traits as well as for
combination of important component characters.
Though the study has clearly highlighted the distinct advantage of BIP
over selfing series, in a self-pollinated crop like chickpea, it can be used only
sparingly. However, the results have shown that, SB is the next better choice
rather than RB in the selfing series for improving yield.
Description
Keywords
null