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<p>This study evaluated the growth and reproductive performance of sex-linked dwarf (dw) and non-dwarf reciprocal crossbred Taiwan Country Chickens (TCC). Two parental lines (NCHU-G101, dw-RF) were reciprocally crossed to produce dw-F01 and F01 hybrids. A total of 108 parental birds (NCHU-G101, <i>n</i> = 45; dw-RF, <i>n</i> = 63) and 142 crossbreds (dw-F01, <i>n</i> = 99; F01, <i>n</i> = 43) which were raised until 72&#xa0;weeks of age were used in this study. Hatching body weight (BW<sub>0</sub>) varied significantly (<i>P</i> &lt; 0.001), with the dw-RF exhibiting the highest BW<sub>0</sub> (39.83&#xa0;g) and dw-F01 the lowest (35.60&#xa0;g). Growth curve analysis showed that F01 had the highest initial growth and maturation rates (<i>L</i> = 0.66, <i>K</i> = 0.16, respectively), while dw-F01 and dw-RF grew more slowly (<i>L</i> = 0.60, <i>K</i> = 0.14). The age of maximum growth rate (T<sub>I</sub>) was significantly later in dw-F01 (10.19&#xa0;weeks) and dw-RF (10.10&#xa0;weeks) than in F01 (9.30&#xa0;weeks; <i>P</i> &lt; 0.05). Despite its slower growth, dw-RF had the highest predicted body weights at inflection (BW<sub>I</sub> = 969.07&#xa0;g) and asymptote (BW<sub>A</sub> = 2634&#xa0;g; <i>P</i> &lt; 0.0001). Egg production traits exhibited reciprocal cross effects, with dw-F01 reaching peak egg production earliest (32&#xa0;weeks, 69%), while dw-RF peaked later with the lowest rate (42&#xa0;weeks, 60%). NCHU-G101 recorded the highest peak laying rate (78%) at 37&#xa0;weeks, followed by F01 (74%). Number of eggs laid at 72&#xa0;weeks of age, (EN<sub>72</sub>) were significantly higher in the NCHU-G101, F01, and dw-F01 (212, 203.4, and 196.56 eggs, respectively) than the dw-RF (146.84 eggs, <i>P</i> &lt; 0.001), with a -3.81% non-significant difference between the hybrids. Despite lower body weights and slower growth performance parameters (L, K, BW<sub>I</sub>, and T<sub>I</sub>) the dw-F01 maintained comparable egg laying performance to the F01, making it a viable choice for sustainable poultry production in Taiwan’s variable climate.</p>

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Growth and reproductive performance of reciprocal crossbred sex-linked dwarf and non-dwarf Taiwan Country chickens

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Samkelo Mlandvo Motsa,
  • Tsung-Che Tu,
  • Szu-Hung Chen,
  • Pin-Chi Tang,
  • Chih-Feng Chen

摘要

This study evaluated the growth and reproductive performance of sex-linked dwarf (dw) and non-dwarf reciprocal crossbred Taiwan Country Chickens (TCC). Two parental lines (NCHU-G101, dw-RF) were reciprocally crossed to produce dw-F01 and F01 hybrids. A total of 108 parental birds (NCHU-G101, n = 45; dw-RF, n = 63) and 142 crossbreds (dw-F01, n = 99; F01, n = 43) which were raised until 72 weeks of age were used in this study. Hatching body weight (BW0) varied significantly (P < 0.001), with the dw-RF exhibiting the highest BW0 (39.83 g) and dw-F01 the lowest (35.60 g). Growth curve analysis showed that F01 had the highest initial growth and maturation rates (L = 0.66, K = 0.16, respectively), while dw-F01 and dw-RF grew more slowly (L = 0.60, K = 0.14). The age of maximum growth rate (TI) was significantly later in dw-F01 (10.19 weeks) and dw-RF (10.10 weeks) than in F01 (9.30 weeks; P < 0.05). Despite its slower growth, dw-RF had the highest predicted body weights at inflection (BWI = 969.07 g) and asymptote (BWA = 2634 g; P < 0.0001). Egg production traits exhibited reciprocal cross effects, with dw-F01 reaching peak egg production earliest (32 weeks, 69%), while dw-RF peaked later with the lowest rate (42 weeks, 60%). NCHU-G101 recorded the highest peak laying rate (78%) at 37 weeks, followed by F01 (74%). Number of eggs laid at 72 weeks of age, (EN72) were significantly higher in the NCHU-G101, F01, and dw-F01 (212, 203.4, and 196.56 eggs, respectively) than the dw-RF (146.84 eggs, P < 0.001), with a -3.81% non-significant difference between the hybrids. Despite lower body weights and slower growth performance parameters (L, K, BWI, and TI) the dw-F01 maintained comparable egg laying performance to the F01, making it a viable choice for sustainable poultry production in Taiwan’s variable climate.