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Genetic Analysis of Powdery Mildew Disease Resistance, Yield and Yield Related Components

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Title Genetic Analysis of Powdery Mildew Disease Resistance, Yield and Yield Related Components
 
Creator Ruchi N. Kengapur
 
Contributor S.K. Deshpande
 
Subject Genetics and Plant Breeding
 
Description The experiment was undertaken to study the magnitude of heterosis and
combining ability for seed yield and component characters and to know the reaction
of the parents and F1 hybrids to powdery mildew disease in sunflower. The material
consisted of three cytoplasmic male sterile lines and eleven restorer lines which were
crossed in all possible combinations. Thirty three F1 hybrids along with 14 parents
and 3 checks were evaluated in RBD with two replications during kharif 2011 and
were analysed in L x T design.
The restorer lines behaved differently on different CMS sources. Five restorer
lines LTR-R-341, RES 834-1, R-45, HRHA 10-3 and RHA 298 restored complete
fertility on all the three CMS lines and only NDR 4 line behaved as a maintainer on
851A x NDOL3 cytoplasmic background.
The hybrid (4546A x NDOL2) x PS 1070 recorded maximum standard
heterosis for both seed yield (25.82%) and oil content (25.11%) and highest
magnitude of average heterosis was observed for seed yield per plant (144.98%).
According to weighted gca method analysis, among the lines 4546A x NDOL2 and
among the testers SCG 37, were found to be the good general combiners for seed
yield and offered scope for improvement in yield and its attributing traits. The hybrids
(851A x NDOL3) x NDR 4 and (852A x NDOL3) x SCG 37 have been considered as
best specific combiners for seed yield and oil content, respectively.
Out of 33 hybrids evaluated for the powdery mildew disease, two hybrids
(4546A x NDOL2) x RES 834-1 and (852A x NDOL3) x SCG 29 were found to be
moderately susceptible to the disease at maturity indicating slow mildewing nature.
In association analysis, seed number per plant (0.9622), head diameter
(0.5169) observed to have a significant and strong relationship with seed yield. The
path analysis indicated that seed number per plant (0.9074) and 100-seed weight
(0.2497) showed direct positive effects on seed yield per plant.
 
Date 2016-11-21T17:20:32Z
2016-11-21T17:20:32Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/86785
 
Format application/pdf
 
Publisher UAS, Dharwad