Question

C1. Calculate the genetic gain for growth rate per generation in a pig nucleus herd, in which the phenotypic variance is 225 (g/d), the genetic variance is 81 (g/d), and when 0.5 % of the best boars and 20 % of the best sows are selected for breeding replacements. Show the working of your calculation. (8 marks) SELECTION DIFFERENTIALS FOR PROPORTION p SELECTED Table for i up to 10 % selected .000 .001 .002 .003 .006 .007 .008 .009 .004 .005 .00 3.400 3.200 3.033 2.738 2.706 2.975 2.900 2.850 2.800 .01 2.660 2.636 2.600 2.482 2.456 2.442 2.569 2.527 2.500 2.550 .02 2.420 2.400 2.386 2.293 2.283 2.370 2.363 2.336 2.323 2.311 .03 2.270 2.258 2.164 2.186 2.174 2.241 2.230 2.221 2.209 2.200 .04 2.153 2.087 2.079 2.071 2.146 2.136 2.098 2.126 2.116 2.107 .05 1.990 2.064 2.000 2.057 2.031 2.022 2.009 2.048 2.040 2.016 .06 1.985 1.931 1.925 1.977 1.958 1.951 1.944 1.937 1.971 1.965 1.871 1.863 1.875 .07 1.919 1.906 1.888 1.882 1.911 1.900 1.893 1.815 1.834 1.820 1.810 1.841 1.837 1.826 .08 1.858 1.852 1.846 1.775 1.760 1.788 1.784 1.780 1.770 1.799 1.793 1.765 .09 1.806 Table for i when more than 10% selected .09 .03 .04 .05 .06 07 08 01 02 .00 1.488 1.428 1.628 1.590 1.521 1.458 1.554 1.667 1.709 1.755 .10 1.202 1.180 1.271 1.248 1.225 1.320 1.346 1.295 1.372 1.400 .20 1.021 984 1.078 1.058 1.039 1.002 1.097 1.118 1.138 1.159 30 .880 846 830 814 863 896 913 .948 931 966 40 .659 735 .720 .704 689 .674 .766 .751 .782 .798 .50 526 540 511 570 .555 .585 .614 599 .629 644 .60 380 365 .424 409 394 438 453 468 482 .70 497 259 243 227 211 290 274 305 320 .335 350 80 .027 .109 090 .070 .049 127 .144 .162 .179 .195 .90 Section C continued over O 8 888

Answer 1

Answer:-

DATE Cgenatypic variaae/phenatypi P Narmw Sense Hentahility vaiane) 81 -0.36 225 (seletion aiflerential) Genctic aain (R)-h Narraw Senre) Heritability S SAwt it is 20% r 0.20 Fr baan itir aS ic aa05 Atna5 levcL of sianiane When sclectioncntcria Selcction R-42s -036x (2.022) -723 selection cntcria. when selection 20%is R-D.36 Y 121 zo435

I have mentioned the data on the basis of level of significance but the selection differential data table do not suggest information regarding the value to be considered.