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HETEROSIS AND COMBINING ABILITY ANALYSIS FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN HORSEGRAM (Macrotyloma uniflorum [Lam.] Verdc.)

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Title HETEROSIS AND COMBINING ABILITY ANALYSIS FOR YIELD AND YIELD CONTRIBUTING CHARACTERS IN HORSEGRAM (Macrotyloma uniflorum [Lam.] Verdc.)
 
Creator RAKESH ALLE
 
Contributor HEMALATHA, V
 
Subject HETEROSIS, COMBINING, ABILITY, ANALYSIS, YIELD, CONTRIBUTING, CHARACTERS, HORSEGRAM
 
Description The present investigation “Heterosis and combining ability analysis for yield and
yield contributing characters in horsegram (Macrotyloma uniflorum [Lam.] Verdc.), had
been undertaken to carry out combining ability analysis, to estimate heterosis, to
understand the nature of gene action, correlation and path analysis of yield and yield
contributing characters. The experimental material for the present investigation
comprised of twenty seven F1 crosses, their twelve parents and one check. The material
was obtained from Regional Agricultural Research Station, Palem, ANGRAU. This
material was evaluated during late kharif 2013. Each entry was sown in two rows of 5
m length with a uniform spacing of 45 x 15 cm in a Randomized Block Design (RBD),
replicated thrice at College Farm, College of Agriculture, Acharya N. G. Ranga
Agricultural University, Rajendranagar, Hyderabad. The data was collected on days to
50 per cent flowering, days to maturity, plant height (cm), number of primary branches,
number of clusters per plant, number of pods per cluster, number of pods per plant, pod
length (cm), number of seeds per pod, 100 seed weight (g) and seed yield per plant (g).
The analysis of variance revealed significant differences among the genotypes for
all the characters studied. The study of analysis of variance for combining ability
revealed the predominance of non-additive gene action for all the traits favouring the
exploitation of heterosis breeding. High general combining ability effects for grain yield
per plant and other yield component characters were noticed in the lines HGP-67, HGP-
40 and HGP-44 and testers Palem-2 and AK-42. These parents had resulted in
production of superior single crosses HGP-40 x AK-42, HGP-67 x Palem-2, HGP-44 x
Palem-2 and HGP-80 x AK-42 for seed yield per plant. Hence, these crosses had
potential application in the crop improvement programmes.
Estimates of heterosis, heterobeltiosis and standard heterosis were variable among
crosses in desirable direction and some of them turned out to be best specific crosses.
The cross combinations HGP-67 x Palem-2, HGP-40 x AK-42, HGP-67 x AK-42,
HGP-44 x Palem-2 and HGP-80 x AK-42 were top five crosses based on mean per se
performance, sca effects and heterosis and these crosses had high seed yield and yield
contributing characters.
Character association among yield and yield contributing characters revealed the
positive association of seed yield per plant with 100 seed weight, number of pods per
plant, number of clusters per plant, number of primary branches, number of pods per
cluster, pod length, number of seeds per pod, plant height and days to 50 per cent
flowering and negatively correlated with days to maturity. Path coefficient analysis had
shown direct positive relationship of 100 seed weight, plant height, number of pods per
plant and days to 50 per cent flowering with seed yield per plant.
The top five superior cross combinations identified in the present investigation
HGP-67 x Palem-2, HGP-40 x AK-42, HGP-67 x AK-42, HGP-44 x Palem-2 and HGP-
80 x AK-42 based on per se performance, heterosis and combining ability for seed yield
and yield contributing characters. These crosses may be further tested before releasing
as commercial hybrids.
 
Date 2016-09-07T13:51:37Z
2016-09-07T13:51:37Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/75924
 
Language en
 
Relation D9516;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD