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<p>Cultivar mixtures can reduce production risk and support climate resilience while maintaining yield stability and enhancing nutritional benefits. This study evaluated the effects of genetic diversity among seven common bean cultivar mixtures on nutritional, agronomic, and organoleptic traits under low-input hill farming systems in Nepal. Four mixtures were developed from advanced breeding lines and landraces collected from diverse field environments. The mixture with the largest number of cultivars (Mix4), in addition of being included as an entry was also established as a separate selection plot for developing three additional mixtures in the second year through selection by male farmers, female farmers, and technicians, respectively. Field experiments were conducted from 2019 to 2021 using a randomized complete block design with three replications. Significant variation was observed among cultivar mixtures for key nutritional traits. Mean comparisons using the Tukey–Kramer test (<i>p</i> &lt; 0.05) revealed that cultivar mixtures, particularly Mix1 and F_sel along with Kalo Male (local landrace) demonstrated superior nutritional profiles compared with the improved check (Trishuli). Agronomic traits showed little to no correlation with nutritional traits, indicating that variation in agronomic traits was largely independent from variation in nutritional traits. Significant differences among field entries were observed for organoleptic preference, with Kalo Male recording the highest Wilcoxon rank sum score (7677), followed by Mix1 (7370), Mix4 (6526), and F_sel (6449), whereas Trishuli showed the lowest score (1263). Overall, cultivar mixtures demonstrated superior performance compared to pure-stand variety, thereby contributing to enhance food and nutritional security in low-input hill farming systems.</p>

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Genetic diversity of common bean cultivar mixtures enhance nutritional, agronomic, and sensory traits in low-input hill farming systems

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • Shree Prasad Neupane,
  • Dipendra Kumar Ayer,
  • Bal Krishna Joshi,
  • Devendra Gauchan,
  • Stefania Grando,
  • Salvatore Ceccarelli

摘要

Cultivar mixtures can reduce production risk and support climate resilience while maintaining yield stability and enhancing nutritional benefits. This study evaluated the effects of genetic diversity among seven common bean cultivar mixtures on nutritional, agronomic, and organoleptic traits under low-input hill farming systems in Nepal. Four mixtures were developed from advanced breeding lines and landraces collected from diverse field environments. The mixture with the largest number of cultivars (Mix4), in addition of being included as an entry was also established as a separate selection plot for developing three additional mixtures in the second year through selection by male farmers, female farmers, and technicians, respectively. Field experiments were conducted from 2019 to 2021 using a randomized complete block design with three replications. Significant variation was observed among cultivar mixtures for key nutritional traits. Mean comparisons using the Tukey–Kramer test (p < 0.05) revealed that cultivar mixtures, particularly Mix1 and F_sel along with Kalo Male (local landrace) demonstrated superior nutritional profiles compared with the improved check (Trishuli). Agronomic traits showed little to no correlation with nutritional traits, indicating that variation in agronomic traits was largely independent from variation in nutritional traits. Significant differences among field entries were observed for organoleptic preference, with Kalo Male recording the highest Wilcoxon rank sum score (7677), followed by Mix1 (7370), Mix4 (6526), and F_sel (6449), whereas Trishuli showed the lowest score (1263). Overall, cultivar mixtures demonstrated superior performance compared to pure-stand variety, thereby contributing to enhance food and nutritional security in low-input hill farming systems.