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<p>Inland salinization is a burgeoning problem, and aquaculture presents a sustainable strategy to utilize these marginal lands effectively. Among candidate species, common carp (<i>Cyprinus carpio</i>) is particularly, suitable for inland saline aquaculture production system. In India, a selective breeding program has been initiated to develop a faster-growing strain of common carp adapted to such environments. The present study reports variability in growth and genetic parameters in common carp produced by selective breeding when cultured in inland saline groundwater of varying salinities. A total of 85 families belonging to various stock combinations were produced, and a further 2140 individuals were PIT tagged and reared communally at two salinities (salinity 1 (S1) 2–4 ppt and salinity 2 (S2) 6–8 ppt) at a stocking density of 5000 fish/ha. The growth-related traits were recorded at three age groups, viz., at stocking, 210&#xa0;days, and 340&#xa0;days of the rearing period. The average body weight (<i>Bw</i>), body length (<i>Bl</i>), and body height (<i>Bh</i>) at stocking were 23.0&#xa0;g, 8.9&#xa0;cm, and 3.0&#xa0;cm, respectively. At harvest (340&#xa0;days of rearing), the average <i>Bw</i>, <i>Bl</i>, and <i>Bh</i>, measured 873.4&#xa0;g, 29.2&#xa0;cm, and 10.8&#xa0;cm, respectively. Salinity had a significant effect on biomass at 210 and 340&#xa0;days of rearing age. The genetic parameters were estimated using a univariate animal model in ASReml 4.0. The body weight exhibited high heritability values at harvest (340-day rearing age), viz., 0.59 ± 0.09 and 0.46 ± 0.08 for S1 and S2, respectively. The phenotypic and genetic correlation between various traits in both salinities at 210- and 340-day rearing age were found to be positive and high. The genetic correlation for body weight at 210-day and 340-day rearing period was 0.94 ± 0.04 and 0.98 ± 0.08 in S1 and S2, respectively. The present study suggests that a 210-day rearing period is an optimal age for genetic selection in an ongoing breeding program. The genetic correlation estimated for body weight as a separate trait across two salinities at two rearing ages was positive and high (<i>Bw</i>210 0.78 ± 0.07 and <i>Bw</i>340 0.64 ± 0.10), indicating a moderate G × E interaction. This is the first report on variability in genetic parameters for growth-related traits and G × E in common carp reared in inland saline water in India.</p>

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Variability in harvest growth traits and genetic parameters in common carp, Cyprinus carpio (Linnaeus, 1758), cultured in extracted inland saline groundwater

  • 期刊论文

  • 发表日期：

    2026年3月2日

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  • P. S. Nagaraja,
  • Mujahidkhan A. Pathan,
  • Ravi Raghul,
  • Susitharan V.,
  • Priyanka Sanwal,
  • Sreedharan Krishnan,
  • Satyendra Singh,
  • Ashok Kumar,
  • Dhalongsaih Reang,
  • Angom Lenin Singh,
  • Aparna Chaudhari

摘要

Inland salinization is a burgeoning problem, and aquaculture presents a sustainable strategy to utilize these marginal lands effectively. Among candidate species, common carp (Cyprinus carpio) is particularly, suitable for inland saline aquaculture production system. In India, a selective breeding program has been initiated to develop a faster-growing strain of common carp adapted to such environments. The present study reports variability in growth and genetic parameters in common carp produced by selective breeding when cultured in inland saline groundwater of varying salinities. A total of 85 families belonging to various stock combinations were produced, and a further 2140 individuals were PIT tagged and reared communally at two salinities (salinity 1 (S1) 2–4 ppt and salinity 2 (S2) 6–8 ppt) at a stocking density of 5000 fish/ha. The growth-related traits were recorded at three age groups, viz., at stocking, 210 days, and 340 days of the rearing period. The average body weight (Bw), body length (Bl), and body height (Bh) at stocking were 23.0 g, 8.9 cm, and 3.0 cm, respectively. At harvest (340 days of rearing), the average Bw, Bl, and Bh, measured 873.4 g, 29.2 cm, and 10.8 cm, respectively. Salinity had a significant effect on biomass at 210 and 340 days of rearing age. The genetic parameters were estimated using a univariate animal model in ASReml 4.0. The body weight exhibited high heritability values at harvest (340-day rearing age), viz., 0.59 ± 0.09 and 0.46 ± 0.08 for S1 and S2, respectively. The phenotypic and genetic correlation between various traits in both salinities at 210- and 340-day rearing age were found to be positive and high. The genetic correlation for body weight at 210-day and 340-day rearing period was 0.94 ± 0.04 and 0.98 ± 0.08 in S1 and S2, respectively. The present study suggests that a 210-day rearing period is an optimal age for genetic selection in an ongoing breeding program. The genetic correlation estimated for body weight as a separate trait across two salinities at two rearing ages was positive and high (Bw210 0.78 ± 0.07 and Bw340 0.64 ± 0.10), indicating a moderate G × E interaction. This is the first report on variability in genetic parameters for growth-related traits and G × E in common carp reared in inland saline water in India.