Use of near infrared spectroscopy for intramuscular fat selection in rabbits | Aplicación de la espectroscopía de infrarrojo cercano en selección por grasa intramuscular en conejo
2011
Zomeño, C., Universidad Politécnica de Valencia (España). Inst. de Ciencia y Tecnología Animal | Hernández, P., Universidad Politécnica de Valencia (España). Inst. de Ciencia y Tecnología Animal | Blasco, A., Universidad Politécnica de Valencia (España). Inst. de Ciencia y Tecnología Animal
The potential use of near infrared spectroscopy (NIRS) for the determination of intramuscular fat (IMF) content in rabbit selection programmes was evaluated. 137 rabbits from three different synthetic lines slaughtered between 5 and 61 weeks of age were used for NIR calibration. Longissimus muscles were ground, freeze-dried, scanned by NIRS reflectance and fat content was chemically analysed. Parameters of calibration equation reported appropriate results for IMF (SECV=0.07; r2=0.98 and RPD= 7.57). Another 88 rabbits were used to study the suitability of NIR spectroscopy in selection programmes. IMF was studied in Longissimus using chemical and NIRS analyses. Descriptive statistics showed that NIRS could be a proper technique to average comparison but regression analyses (r-square=0.92) indicated that NIRS would not accurate enough to predict genetic individual values for ranking of animals. However, NIRS technique could be applied in truncated selection where the efficiency of the method is measured by the response to selection. Chemical IMF values of selected individuals using NIRS criterion were similar to those obtained if selection had been carried out using chemical criterion. Results of the present experiment confirmed the potential of NIRS for the determination of IMF content in rabbit selection programmes instead of using laborious chemical methods.
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