Genetic evaluation of productive longevity in a multibreed beef cattle population.

Heritability estimates for PL were relatively low, with values of 0.109 for REP and a decreasing trend for RRM with values ranging from 0.16 to 0.04.

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The additive genetic variance curve presented a decreasing trend from the second to the eighth parity ( Figure 5A ), while contemporary group variances were almost constant up to the fourth parity with an increasing trend afterwards ( Figure 5C ).

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