review on rex rabbit breeding in china - World Rabbit Science ...

9 th World Rabbit Congress – June 10-13, 2008 – Verona – Italy
Comprehensive selective index method
According to the phenotype, heritability, economic importance, and correlation between phenotypic
and genetic traits, we get the comprehensive selection index formula as follows:
In the formula:
Wi is the economy significance of trait i;
h²i is the heritability of trait i,;
W is the average value of trait i;
Pi is the observed value of trait i;
W i h i 2 P i
I = ∑────── × 100
Pi∑Wihi 2
Simple selective breeding table method
The authors developed a simple selective breeding score tables method for the Rex Rabbit (Table 1).
Table 1: Score table of Rex Rabbit
Rank Index Grade Remarks
Weight
3.75~4.0( 2.5、 3.5)
kg 30
3.5~3.74(2.0、3.0) kg 25
3~ 3.4(2.0、
2.75) kg 20
Body type Standard 20
Qualified 15
Low-graded 10
Hair density ≥2.0 Ten thousand 30
≥1.7 Ten thousand 25
Hair length
Hair smoothness
≥1.3 Ten thousand 20
1.8-2.2 20
1.6-1.79 15
90;
second-class:>85;
third-class: >70;
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