Record Details

Development of new CMS lines with diversified CMS sources in sunflower (Helianthus annuus. L.)

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Development of new CMS lines with diversified CMS sources in sunflower (Helianthus annuus. L.)
 
Creator C, Nandini
 
Contributor Y. G, Shadakshari
 
Subject hybrids, sowing, developmental stages, yields, heterosis, crossing over, oils, planting, biological phenomena, genetics
 
Description Ninety six inbreds were crossed with six diverse CMS lines viz., ARG-
6-3-1-4, MUT2-8-3-2, ARG-3, PRUN-29, PKUZ and ARG-2-1-2 to know their
fertility restoration and sterility maintenance behaviour. Among these 39
and 38 inbreds were identified as common restorers and maintainers
respectively, for all the six diverse CMS lines. Out of 38 common sterility
maintainers, 22 promising maintainer lines were selected for conversion into
new CMS lines. A total of 127 backcross lines are under conversion in BC2F1
and six backcross lines in BC3F1 generation. 234 hybrids having common
restorers were evaluated for combining ability and heterosis. The line PRUN-
29 and ARG-3 and testers RHA-6D-5-3-9 and RHA-95-C-1 were found to be
good general combiners for head diameter, stem diameter, seed yield per
plant, 100 seed weight and oil content. Among the hybrids, ARG-2-1-2 x
RHA-6D-5-3-5 and ARG-3 x RHA-6D-5-3-9 was identified as the best
specific combination for head diameter, seed yield per plant,100 seed weight
and oil yield. The predominance of non additive gene action was observed for
all the eleven characters studied. Hybrids, ARG-2-1-2 x RHA-95-C-1 and
ARG-6-3-1-4 x RHA -95-C-1 exhibited highest significant positive heterosis
for seed yield per plant and oil content over KBSH-1, KBSH-44 and KBSH-
53. Assessment of morphological and molecular diversity resulted in
grouping of 45 parental lines into six and five clusters respectively. The
parents with intermediary genetic divergence produced higher frequency of
heterotic crosses. Estimates of heterosis significantly regressed towards
genetic divergence of the parents for traits; days to 50 per cent flowering,
head diameter and test weight at morphological level and for head diameter,
seed yield per plant and oil yield at molecular level.
 
Date 2016-05-20T12:55:55Z
2016-05-20T12:55:55Z
2013-07-31
 
Type Thesis
 
Identifier Th-10563
http://krishikosh.egranth.ac.in/handle/1/66164
 
Language en
 
Format application/pdf
 
Publisher University of Agricultural Sciences, Bengaluru