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Construction of Multitrait Sire Indices in Rhode Island Red Pure Line Chicken

KrishiKosh

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Title Construction of Multitrait Sire Indices in Rhode Island Red Pure Line Chicken
 
Creator Gotarne, V. T.
 
Contributor Ali, S. Z.
 
Subject null
 
Description The present research work entitled "Construction of Multitrait sire indices
in RIR pure Iine chicken" was carried oul at Department of Animal Genetics and
Breeding, Post Graduate lnstitute of Veterinary and Animal Sciences, Akola. The
informations on 1615 birds of 64 sires of RIR pure line breeds extending over a
period of 2 years (2001 and 2002) for economic trails were taken from Central
Poultry Breeding Farm, Goregaon, Mumbai. week of age, egg Number at 40 week of age were 159.99 + 0.30 days, 136g.46 +
4.36 gms. 1583.15 1 5.46 gms, 46.1'1 + 0.10 gms. 42.30 + 0.1Ogms, and 85.42 +
0.52 numbers respectively. The heritability estimates of age at sexual maturity, Body weight at 20
week of age, Body weight at 40 week of age, egg weight at 40 week of age, egg
weight at 32 week of age and egg number at 40 week of age were 0.37 + 0.08,
0.45 + 0.09, 0.39 r 0.09, 0.61 + 0.11, O.tO + 0.12 and 0.36 + 0.08 respectivety.
Ivlultitrait selection indices were constructed on lhe basis of economic
traits using genolypic and phenotypic variances and covariances matrices
technique for estimation of'b'values under equal economic weightage of one (1)
for all the traits and index values (l = lbixi) were calculated for each index. The
highest coefficient value (b) for affect the overall (b) values in different indices
indicated that age at sexual maturity and egg weight 40 week are the important
economic traits which affects the index value followed by egg number 40 week
and body weight at 20 week of age. 20% superior sires i.e. 13 sires out of 64 were selected and in listed. The
sire values were arranged in decending order and merat number were allotted to
each sire in all the different indices. lt is interesting to point out that out of 20%
superior sires the sire no 5, 14, 23, 15 and 29 are the sires which are present in
each sire index at various merit number varied from merit no 1 to 13.
The comparison of ranking of sires based on various traits combination in
all the five sire indices were compiled and compared. Based on the rank'ng, it is
observed that the superiority of the sires in descending fashion found to be as 29,
23, 14, 5, 15, 17,1,24,4,25, 12,20 and 16, l20o/o selection is adopted for
selecting superior sires. The first five superior sires based on multiindex multitrait
comparison are sire no 29, 23, 14, 5 and 15 whtch are lhe same sires which got
the position in 20% selected sires in every sire index. It is therefore concluded that any of the sire index may serve the purpose
of selection of 20% superior sire as lhe final five top ranking sires got position in
each sire index estimated for dlfferent characteristics simultaneously.
 
Date 2018-01-29T07:31:55Z
2018-01-29T07:31:55Z
2007
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/5810039959
 
Language en
 
Format application/pdf
 
Publisher MAFSU, Nagpur