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

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4l % lnam weight, ham surface area, age to market weight, respectively. Al-1 differences rr'ere statisticalry signíficant (p
43 Table 16. Means and standard deviations of carcass measurements and age to market weight traits for each farrowing group (adjusted for sex and carcass weíght) Trait n 389 Farrowing group 625 44L Carcass length (cn) 77 .24!2.r|b 7 6 .28!2 .3La 7 6.53!2.L64 Shoulder fat thickness (cu) 4.42t0.46b 4.22!0.484 4.27!0.464 Mid-back thickness (crq) 2 .18t0. 3Bc 2.0810.36b 2. O3t0 . 364 Loin fat thickness (cto) 3 .33rO.3Bb 3 .33t0.38b 3 .28t0 .38a Total fat thickness (cn) 9 .9310 " 91b g .6gxo.gla g.6oto.g|a Loin eye ? area (.rn-) 28 .3813.614 28.44!3.684 28 . B3t3 .614 Grade index gg .67 !2 .Bza LOO .4L!2.74b LO} .2L!2.77b % t,am weight 26 .72!L -6gc 26 .09t1.5g4 zø.4stt.4zb Hau surface area ("r2) LzL.O7!r5.224 725 .45!L4.g6c L23.O7tLz.g6b Predic ted yield (7") 7o .45!z.3Ba 7L.L2t2.47c 70.80t2.20b Age to market weight (days) 185 .00114 . B9a 188 .50t16 . 00b 191 .14t15 . BBc "b"Diff.tent superscripts indicaËe significantly different at p
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 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: 4L Table 15 - Means and standard de
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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