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TRIALLEL ANALYSIS FOR YIELD AND ITS ANCILLARY CHARACTERS IN OKRA [Abelmoschus esculentus (L.) Moench]

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Title TRIALLEL ANALYSIS FOR YIELD AND ITS ANCILLARY CHARACTERS IN OKRA [Abelmoschus esculentus (L.) Moench]
 
Creator GOHIL, VANRAJ N.
 
Contributor VASHI, P.S.
 
Subject crossing over, planting, fruits, yields, additives, developmental stages, heterosis, vegetables, biological phenomena, genetics
 
Description Triallel analysis was performed using six genetically diverse
genotypes and one improved variety of okra. The trial was conducted in a set
of 112 entries including seven parental lines at College Farm, N.M. College
of Agriculture, Navsari Agricultural University, Navsari during summer,
2005. The characters studied were days to first fruit set, plant height,
branches per plant, fruit length, fruit girth, fruits per plant, yield per plant and
incidence of yellow vain mosaic. The data were analysis as per the model
suggested by Ponnuswamy (1972).
The triallel cross analysis of variances indicated the presence of
additive and non-additive gene action in make up of all the traits because all
the line effects except two line specific effect of second kind for plant height
were significant.
Some of the genotypes were found to be good as both grand parents
and immediate parents. They were JO(2000-S)-3 for days to first fruit set and
fruit length; JO (2K-5) for yield per plant and fruit length; JO(2000-S)-12 for
fruit girth; JO (2K-1) for branches per plant and JO(2000-S)-18 for incidence
of yellow vein mosaic.
Considering the three line specific effects of all the traits, crosses
(JO (2K-5) x JO (2K)-10)JO(2000-S)-12, (JO (2K-1) x Parbhani
Kranti)JO(2000-S)-3 and (JO(2000-S)-12 x Parbhani Kranti)JO (2K)-10 were
found to be important from the unified action point of view for yield and its
ancillary characters. In some of the crosses reciprocal effects were found to
be significant which indicated that the performance of triplet was influenced
by order of parents appeared in a specific cross therefore, while planning the
crossing programme, order of parents should be taken in to consideration.
Among components of gene action dominance x dominance was
predominant for all the characters except days to first fruit set where additive
x dominance was higher. Wherever additive component was parents it was
minor in magnitude and dominance component was negative for all the traits.
The predominant dominance x dominance component can be exploited
through hybrids derivative programme, for improvement in yield and it
ancillary characters in okra. Hybridization involving identified better parents
for respective traits followed by selection may be practiced for further
improvement of the traits where additive component was involved in the
expression of the characters.
 
Date 2016-03-08T09:18:06Z
2016-03-08T09:18:06Z
2007-06
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64895
 
Language en
 
Format application/pdf
 
Publisher Navsari Agricultural University, Navsari