Estimation of genetic and phenotypic parameters in a closed ...

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Table 2. Summary of herltabllity estlmates of carcass measurements and age to rnarket weight traits Tralts h2 Mechod of estimatlon No. of observatlons Refe¡ence Carcass length 0.52 0.78r{.10 0.87 0 .50+0 . 16 0.464n.04 0.64 Pooled from paternal, maternalhalf-slb and fu11-slb correlaLLon Paternal half-slb correlatlon il il tr il ttililtt tr tr It tt Pooled frofl paternal- half-sib correlatlon and parent-offspring regressfon 53r 1,936 2,296 7,275 44,969 2,031 Enfleld and llhatley (1.961) Smlth et a1. (1962) SmlLh and Ross (1965) Roy et al. (1968) Flock (1970) Fahmy and Bernard (f970) Backfat thlckness . Mean Shoulder Mid-back Loln Mean Shoulder Rtb Lofn Mean Mean Mean 0.63 0,62r{.10 o . 73-rc.10 0.71+0.10 0.74 0.26r{.11 0.43+O.13 0.zsfl.L2 0.35r{.12 0.69-rc.17 0.s3 Pooled from paternal, maternal halfslb and fu11-s1b correlatlon Paternal half-slb correlatlon tr[[ llItil ll il tt il[il lrltil ll il il llrfil 531 7,936 2,296 1 ,191 585 650 Enf íel.d and h¡hatley (1961.) Smlrh et al. (1962) Smlth and Ross (1965) Roy et al. (1968) Jensen et al. (1967) Arganosa et al. (1969) . . Contlnuetl
Table 2 (Contlnued) TraÍtg h2 Method of estlMtlon No. of observaËlons Reference Mean Mean Mean Mean Mean 0 . 46J{ .05 0.67 0.25 0.30+0.07 0.35r{.12 Paternal half-elb correlatlon Pooled frorn paternal half-s1b correlaÈ1on and parenË-offeprfng regreselon PaEernal half-e1b correlatLon tt il tt I Irtilil 44,969 2,03L 4,639 5,952 L,L94 Ilock (1970) Fahmy and Bernard (1970 glere and Ihonson (1972) Swlger ec al. (1979) Roy eE al. (1968) Loln eye area 0.44 0 . 35r{ .09 0.t+9 0.56+4.22 0.47 0 . 45rr0 .04 0.48 0.70 0.56r{).06 Pooled from paternal, maternal half-elb and full-elb correlatlon Paternal half-efb correlaEion trilItU trÙil[ tr il [ il ilililil Pooled from paternal half-s1b correlatl-on and parent-offsprlng regresslon Paternal half-e1b correlatlon ll I tt I 531 1,936 2,296 528 650 44,969 2,O31 4,639 5,952 Enffeld and Whatley (1961) Smleh et a1. (1962) Smfth and Roee (1965) Roy et al. (1968) Arganoea et al. (1969) Flock (1970) Fabmy and Bernard (1970) Slers and Thomson (1972) Swiger et a1. (1979) . Contfnued
Page 1 and 2: ESTIMATION OF GENET]C AND PHENOTYPI
Page 3 and 4: ACKNOI^rLEDGÐ{ENTS The author wish
Page 5 and 6: iÍi carcass length,77.22!2.47 cm¡
Page 7 and 8: TABLE OF CONTENTS Page B. Carcass m
Page 9 and 10: va1 LIST OF TABLES Table Page L7 Me
Page 11 and 12: INTRODUCTION The heritabilíty of t
Page 13 and 14: granddaughter on granddam. The heri
Page 15 and 16: Table 1 (Contlnued) Tralcs a n Meth
Page 17: 7 r^/ith the number of pigs born al
Page 21 and 22: 11 as 0.31 and 0.40 by Edwardsand O
Page 23 and 24: 13 and backfat thickness r^7as nega
Page 25 and 26: Table 3. Managra breed development
Page 27 and 28: L7 Adjusted Y, = Y. - b (Xt-X") whe
Page 29 and 30: 19 9) 'PercenË Ham I{eight The pro
Page 31 and 32: 2I Table 6, Regression coefficients
Page 33 and 34: a') variance is given in Table 7. T
Page 35 and 36: 25 where: "ott(*y) 2 ã: "r(x) = to
Page 37 and 38: ¿/ l. Heritability estimates - The
Page 39 and 40: 29 Standard errors (S.E.) following
Page 41 and 42: 31 tots (*v) toto(*y) = totw(*y) =
Page 43 and 44: -f1 RESULTS AND DTSCUSSION A. Repro
Page 45 and 46: Table i-2. Means and standard devla
Page 47 and 48: a1 Table 13. Estímated heritabilit
Page 49 and 50: Table 14. PhenotypÍca and geneticb
Page 51 and 52: 4L Table 15 - Means and standard de
Page 53 and 54: 43 Table 16. Means and standard dev
Page 55 and 56: 45 Most of the heritabilities deriv
Page 57 and 58: 47 moderately heritable while carca
Page 59 and 60: ,o AJ et 41. (L969), Roy er al. (19
Page 61 and 62: 51 to phenotypic correlations in mo
Page 63 and 64: 53 SI]MMARY AND CONCLUSION Data fro
Page 65 and 66: 55 also improve Ëhe others where s
Page 67 and 68: 57 Flock, D.K. 1970. Genetic parame
Page 69 and 70:
APPENDIX s9
Page 71 and 72:
Appendix rr. Anal-ysis of covarÍan
Page 73 and 74:
Appendlx rrr' Ànalysfs of varlance
Page 75 and 76:
Appendlx IV (Conrinued) Mean cross
Page 77 and 78:
Appendlx IV (Conrlnued) Mean cross
Page 79 and 80:
Appendlx IV (Contlnued) Mean cross
Page 81 and 82:
^Appendix IV (Continued) Mea4 cross
Page 83 and 84:
Appendix IV (Conctnued) Mean crosà
Page 85 and 86:
75 Appendix V. Table of differentia
Page 87 and 88:
77 Appendix VI. (Continued) Body wt
Page 89:
79 Appendix VI. (Continued) Body wt
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