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Study of performance of Gossypium harknessii and Gossypium aridum CMS based and conventional intra-hirsutum Hybrids over environments

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Title Study of performance of Gossypium harknessii and Gossypium aridum CMS based and conventional intra-hirsutum Hybrids over environments
 
Creator PATEL, MANHAR C.
 
Contributor PATEL, U.G.
 
Subject cotton, crossing over, yields, hybrids, heterosis, planting, sowing, biological phenomena, animal husbandry, environment
 
Description In the present investigation, a set of 44 genotypes comprised of 10
parents, 32 hybrids and two checks were sown at Surat, Bharuch and Hansot in
kharif 2003-04 to study magnitude of heterosis, combining ability and stability of
performance of CMS based and conventional crosses in G. hirsutum L. cotton for
16 characters including seed cotton yield, its components and fibre traits
following L x T mating design of Kempthorne (1957). The trial was laidout in
randomized block design replicated thrice. The net plot comprised of one row
having 10 plants spaced at 120 cm between rows and 45 cm between plants.
Significant to highly significant positive standard heterosis for seed
cotton yield and its component characters in the crosses suggested that there is a
good scope of exploiting the heterosis commercially and also possibility of
isolating desirable segregants in both the types of crosses (CMS based and
conventional crosses).
Combining ability analysis revealed importance of both additive as
well as non additive gene effects in the inheritance of all the traits studied.
However, magnitude of variances due to SCA was comparatively larger than those
of GCA for all the characters. Among the parents, LRK 516 and AKH 26 were found
to be good general combiners for seed cotton yield and some of its yield
components. The crosses viz., LRK 516 x AKH 39, CAK 8835 x AKH 39, CAK 3456 x
AKH 26 and CAK 3456 x AKH 39 showed higher order heterosis and SCA effects for
seed cotton yield in both, conventional and CMS-R systems.
Analysis of variance for stability parameters showed that G x E
component was substantial for all the traits studied. Both linear and non linear
components were important for most of the characters. Preponderance of non
linear component indicated inability of predicting the performance of these
genotypes across the environments. Looking to the overall performance, parental
lines viz., LRK 516 and AKH 26 were the stable with general combining ability in
both the types of crosses. Among CMS based crosses, three viz., LRK 516 x AKH
26, LRK 516 x AKH 39, CAK 8835 x AKH 26 and in conventional crosses, CAK 8835 x
AKH 26 and CAK 3456 x AKH 39 had high mean values with comparatively higher
stability of performance.
The comparative study of conventional and CMS-R system crosses for
heterosis, combining ability and stability showed that heterosis, combining ability
effects and stability was comparatively higher in magnitude in conventional
crosses as compared to CMS based crosses. There is no effect of source of male
sterility on the performance of their resultant hybrids. But CMS based crosses also
showed significant heterosis, combining ability effects and better stability which
indicated the possibility of fruitful utilization of CMS-R system for development of
high yielding commercial hybrids.
 
Date 2016-03-08T13:24:30Z
2016-03-08T13:24:30Z
2008-01
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64930
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari