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GENETIC ANALYSIS OF YIELD AND YIELD COMPONENTS IN RABI SORGHUM (Sorghum bicolor (L.) Moench)

KrishiKosh

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Title GENETIC ANALYSIS OF YIELD AND YIELD COMPONENTS IN RABI SORGHUM (Sorghum bicolor (L.) Moench)
 
Creator KADAM, PRALHAD S.
 
Contributor VASHI, P.S.
 
Subject hybrids, grain, yields, crossing over, heterosis, biological phenomena, sorghum, planting, diseases, developmental stages
 
Description In the present investigation information on the
magnitude of heterosis, combining ability and gene action were
obtained for grain yield and its components following line x
tester analysis involving three CMS lines and twelve testers of
rabi sorghum. The experimental material consisting of fifteen
parents, their thirty six F1s and a standard check were tested in
randomized block design with three replications at Achhalia and
Tanchha centers of Navsari Agricultural University during rabi
2006 under residual soil moisture condition. Observations on ten
characters were recorded at each location.
The analysis of variance for all the characters revealed
presence of considerable variability in the material under study.
Large variances due to locations for panicle weight and grain
yield per plant indicated appreciable influence of environment on
the expression of these traits. Highly significant differences
among male and female lines were observed for all the traits.
Both parents and hybrids interacted significantly with locations.
Among the parents, females x locations interaction were
considerably smaller for majority of the characters than males x
locations interaction indicating stability of female parents.
Hybrids were found more sensitive to change in environment.
None of the parents as well as hybrids showed
consistent performance for all the characters. Among parents, MS
116A, PVR 453, SPV 1411 and CSV 14R while among hybrids,
MS 116A x PVR 453, PMS 7A x SPV 1411, MS 116A x SPV
1595 and PMS 7A x CSV 14R exhibited high mean performance
for grain yield and some of its components.
Number of primaries per panicle was found to be the
most heterotic component followed by grain yield per plant,
panicle weight and number of grains per panicle. The crosses MS
116A x PVR 453, PMS 7A x SPV 1411, MS 116A x SPV 1595
and PMS 7A x CSV 14R recorded higher heterosis for grain yield
and some of its attributes over the standard check. The higher
heterosis of crosses was closely related with their per se
performance. Most of the high heterotic crosses involved at least
one parent with high gca effects.
Combining ability studies indicated that non-additive
gene action was predominant in the inheritance of grain yield and
yield components. Specific combining ability variance was found
susceptible to the environment for most of the characters.
Parental lines MS 116A, SPV 1411, PVR 453, SPV 1595, CSV
14R and CSV 216R were found good general combiners for grain
yield per plant, panicle weight, number of primaries per panicle,
panicle length and number of grains per panicle. The per se
performance of parents for various traits in general was
associated with high gca effects indicating per se performance
could be good indicator of good general combining ability.
The estimates of sca effects revealed that none of the
cross was superior for all the characters. The crosses MS 116A x
PVR 453, PMS 7A x SPV 1411, MS 116A x R 40911 and PMS
7A x CSV 14R exhibited highly significant sca effects along with
high per se performance and standard heterosis for grain yield
per plant and some of its components. All these crosses involved
at least one parent as good general combiner.
On the basis of results of heterosis, gene action and
combining ability, appropriate breeding methods viz., heterosis
breeding, reciprocal recurrent selection and biparental mating for
enhancement of traits associated with grain yield has been
suggested.
 
Date 2016-03-08T12:05:04Z
2016-03-08T12:05:04Z
2007-06
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64924
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari