RIPITABILITAS (REPEATABILITY)

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1 RIPITABILITAS (REPEATABILITY)
Rumus umum : r = Vg + Vep VP

2 Rumus umum P = G + E E = Ep + ET r = Vg + Vep VP

3 Cow no. : 1st lact. (100kg) : 2nd lact. (100kg) : 1 50 55
REPEATABILITY (r) The ability to repeat expression of particular trait on the future/ next production period Correlation between (2 periods), or among (3 or more periods) measurements Examples : Cow no. : st lact. (100kg) : 2nd lact. (100kg) : r ?

4 Repeatability of fther traits

5 Relationship between repeaability, heritability, genetic correlation
Hubungan antara : Generasi 0 : Periode I : Periode II : Periode III : X X X1 X X X2 Generasi I : Periode I : Periode II : Periode III : X X X1 X X X2 rp rp r r h2 rg

6 Method to estimate repeatability
CONTOH I 1. Metode korelasi 2. Anova Yij = U + ai + eij BW I 18 22 24 21 19 23 26 BW II 20 25

7 Dalam individu diantara pengukuran
σ2w r = σ2w + σ2e Anova k1 = 1/(M-1) { n. – (∑ni2 / n. )} Kalau pengukuran per individu sama maka k1 = k yi banyaknya ulangan/ pengukuran per individu. Di mana : M adalah banyaknya individu, n. banyaknya semua catatan/ pengukuran, ni adalah pengukuran per individu Sumber keragaman db JK KT KTH Diantara individu M – 1 JKw KTw σ2w + k1σ2e Dalam individu diantara pengukuran n. - M JKe KTe σ2w Total n. – 1

8 Ripitabilitas dengan Anova
birth weight/ BW (kg) CONTOH II No./identity Milk I Milk II Milk III 1 20 21 22 2 19 3 4 23 5 6 7 24 8 9 18 10

9 SE r = √2(1-r)2 [1+(k1-1) r]2 / k1 (k1-1) (M-1)
Estimasi r + SE Selamat belajar

10 Nama : Indah Kusumawati Elysa Fitria