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

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Table 1. Surnmary of herltabil-1ty estlÍìates of reproductive tralts Traltg .2 h MeEhod of estLmaElon No. of observatlons Refe¡ence Total rio. born 0 . 094{ .04 0.11 Dam-daughter regresslon Pooled 3,78L ist Urban eL a1. (1966) Fahmy and Bernard (1972) -0,03]{.02 -0.05J{.03 0.72+4.22 Half-s1b correlaLlon Half-sfb correlaElon 175 158 2,095 Krotch (1975) Young et a1. (1978) No. born al-1ve 0.03r{.07 Dam-daughter regresslon 1,959 Boyl.an et al. (1961) 0.20-rc.15 0.59{{. 29 Dam-daugh ter regresslon Half-stb correlatlon 304 304 Stockhausen and Boylan (1966) 0.08+0.04 0.07r{).02 0.09 0.13r{.06 0.2814.26 -0 .01r{.02 0.03r{.03 Dam-daughter regresslon Dam-daughEer regresslon Pooled Dam-daughter regressJ-on Granddam-granddaughter re gress lon Half-sib correl-aE1on 3,78L 3B, o0o 75r 750 539 L75 158 Urban et al. (1966) Strang and Ktng (1970) Fahmy and Bernard (1972) Revelle and Robtson (1973) Krotch (1975) 0 .7 2+4 .22 Half-sib correlaÈ1on 2,095 Young et al. (1978) No. pigs weaned 0.13r{ .05 0.09-rc.03 0. 15 Dam-daughLer regresslon Dam-daughter regresslon Pooled t 701 38,000 75r Urban et a1, (1966) Strang ancl Klng (1970) Fahmy antl Bernard (1972) 0.04]{ .04 0 .09r{.02 0.29+4.25 Half-slb correlatlon Half-slb correlatlon t75 158 2,O95 Krotch (1975) Young et a1. (1978) . , Contlnrrecl
Table 1 (Contlnued) Tralcs a n Method of estlr¡ation No. of observatl-ons Reference Plg blrth LrelghL 0.0il{.35 0.2714.06 0.17 0.0410.04 -0 . 04{{ .04 0.001{.03 0.16J{.16 0.10+0. 15 Half-s1b correlaElon Regresslon of offsprlng on mid-parent Pooled from above Er,¡o esÈfwrtlons Regresslon of offsprlng on slre Regresslon of offsprlng on dam Regreeslon of offsprlng on n1d-parent Half-efb correlaElon Half-sib correlatfon 6,846 3,760 2,095 r,246 f'ahny and Bernard (1970) Edr¿ard Young Roy et and Omtvedt (1971) et al. (1978) a1. (1968) Plg weaned welght o.r4+4.26 0.08r{.04 0.1r 0.08-m.04 0.02{{) .04 0. o5i{.03 0.46{{.19 0.18+0.15 Half-s1b correlaclon Regreselon of offsprlng on mld-parenE Pooled from above Ëwo esÈlmaE.1ons Regresslon of offspring on sire Regressfon of offsprlng on dam Regresslon of offspring on mid-parenE Regresslon of offsprlng on dam Half-sfb correlatlon 6,846 2,956 38,000 2,O95 Fahmy and Bernard (1970) Edward and Omtvedt (1971) SErang and Klng (1970) Young et a1, (1978)
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: granddaughter on granddam. The heri
Page 17 and 18: 7 r^/ith the number of pigs born al
Page 19 and 20: Table 2 (Contlnued) TraÍtg h2 Meth
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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