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Evaluation of yearly generations of interspecific crosses of Carthamus species for productive recombinants

KrishiKosh

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Title Evaluation of yearly generations of interspecific crosses of Carthamus species for productive recombinants
 
Creator Lucy Kumari
 
Contributor R.L.Ravi Kumar
 
Subject Genetics and Plant Breeding
 
Description The field experiment comprising four interspecific F2 and F3 populations was carried
out during rabi 2008-09. The laboratory experiment was conducted to identify the
polymorphic molecular markers between parental lines A 1 and C. palaestinus and to study
the segregation of some of the polymorphic markers in F2 population A 1 x
C. palaestinus. The main objectives of the study were to assess the genetic variability for
seed yield and its components, identification of superior recombinants in early segregating
generations of interspecific crosses and analysis of molecular diversity in parental lines of
Carthamus and segregation of selected markers in F2 generation.
The comparison of mean revealed that the F2 populations were having significantly
higher mean compared to that of F3 populations for important productive traits like plant
height, test weight, volume weight and seed yield/plant. All the four populations differed for
variance value for majority of the traits studied.
Correlation studies indicated that seed yield/plant was strongly associated with plant
height, number of capitula/plant, volume weight and capitulum diameter in both the F2
populations, whereas, in F3 populations it was strongly correlated with plant height, number
of capitula/plant and number of branches/plant. The volume weight is significantly associated
with seed yield/plant in all the four populations suggesting selection for high yield may not
reduce the oil content.
Path analysis for seed yield revealed that seed yield was directly influenced by plant
height, number of capitula/plant and volume weight in all the four populations.
The polymorphism between the parental lines A 1 and C. palaestinus was studied by
using 13 ISSR and 16 EST-SSR markers. ISSR5 showed highest number of polymorphic
bands. Seven EST-SSR markers were polymorphic and among these three (SES-33, SES-100
and SES-144) were selected to study the segregation pattern in interspecific F2 population of
A 1 x C. palaestinus. The SES-33 produced the expected 1:2:1 monogenic ratio and
remaining two showed significant deviation from the monogenic ratio.
 
Date 2016-10-28T16:22:06Z
2016-10-28T16:22:06Z
2009
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/82863
 
Format application/pdf
 
Publisher UAS, Dharwad