Record Details

STUDY OF HETEROSIS, COMBINING ABILITY AND STABILITY IN INTRA AND INTERSPECIFIC CROSSES OF ASIATIC COTTONS

KrishiKosh

View Archive Info
 
 
Field Value
 
Title STUDY OF HETEROSIS, COMBINING ABILITY AND STABILITY IN INTRA AND INTERSPECIFIC CROSSES OF ASIATIC COTTONS
 
Creator PATEL, AKSHAY I.
 
Contributor PATEL, U.G.
 
Subject cotton, crossing over, planting, yields, hybrids, sowing, heterosis, environment, biological phenomena, animal husbandry
 
Description A set of 62 G. arboreum L. and G. herbaceum L. genotypes
including six GMS females, eight males and their 48 single F1 hybrids were
sown at three locations in Gujarat viz., Surat, Bharuch and Hansot to study
the magnitude of heterosis, combining ability and stability parameters in
inter and intraspecific crosses of Asiatic cottons for 16 plant characters
including seed cotton yield and its component characters following line x
tester mating design. The experiment was conducted using randomized
block design replicated thrice. Each plot consisted of single row, 4.5 m long
spaced at 1.20m.
Significant differences were observed among parents and
hybrids indicating considerable genetic variation among these genotypes.
Significant standard heterosis and high per se performance with
regard to seed cotton yield and its components were recorded by 35N x 824
(intra arboreum); 4011 x G.Cot.17, 4011 x GShv 1012/90 (intra
herbaceum); 378BK x 824, 4011 x 824,35N x G.Cot.17 and 8401 x
G.Cot.17 (interspecific) in positive direction. The magnitude of heterosis
was higher in interspecific crosses.
Combining ability analysis revealed that both additive as well
as non-additive effects were important in the inheritance of all the traits
studied. However, magnitudes of variances due to SCA were comparatively
larger than those of GCA for all the characters. Among the parents, 4011,
824, G.Cot.17 and 35N were good general combiners for majority of the
traits, including seed cotton yield. The crosses viz., 378BK x 824, 35N x
G.Cot.17, 8401 x G.Cot.17 (interspecific) and 4011 x GShv 1012/90 (intra
herbaceum) showed higher order SCA effects for seed cotton yield and its
component characters in both intra and interspecific crosses.
Stability analysis revealed that environmental component was
considerably higher than genotypes and genotype x environment
components for all the characters. Both linear and non-linear components
were important for most of the characters. However, larger magnitude of
non-linear component for average boll weight, lint index and oil content
indicated inability of predicting the performance of these genotypes across
the environments.
Looking to the overall performance, parental lines viz., 35N,
4011, 824 and G.Cot.17 were the best general combiners in both types of
crosses. The most stable parent was 8401 for seed cotton yield. The cross
378BK x 824 was the top yielder with desirable stability. Among crosses
viz., SRT GMS-1 x G.87-435 (intra arboreum), 378BK x 824 and 35N x
G.Cot.17 (interspecific) showed comparatively stable performance.
The comparative study of intra and interspecific crosses in the
present material revealed higher magnitude of heterosis, gene effects and
stability parameters in interspecific crosses. However, intraspecific crosses
also shared significant heterosis, combining ability effects and better
stability which indicated the possibility of utilizing intra-herbaceum/intraarboreum
crosses for development of commercial hybrids using GMS
system.
 
Date 2016-03-08T13:20:34Z
2016-03-08T13:20:34Z
2007-05
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64929
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari