Scholarlink

<p>This study evaluated 40 groundnut (<i>Arachis hypogaea</i> L.) genotypes under contrasting phosphorus (P) regimes to assess physiological responses, quantify agronomic performance, and identify phosphorus use-efficient (PUE) genotypes. Field trials were conducted at two locations (Kano and Jigawa states) in Northern Nigeria. Data were collected and included physiological, agronomic and photosynthetic efficiency parameters using a MultiSpeQ PhotosynQ 2.0 device. Results revealed significant genotypic variation (<i>P</i> &lt; 0.05) and genotype × phosphorus application interaction for some physiological, yield, and P use efficiency traits. Pod yield ranged from 535 to 1,894&#xa0;kg ha⁻¹, while kernel yield varied from 389 to 1,160&#xa0;kg ha⁻¹ across treatments. Several genotypes, including ICG-13,603, ICGV-1,506,237, and VMICGV-1,576,855, exhibited high agronomic PUE values (&gt; 13.0&#xa0;kg grain kg⁻¹ P) under P-sufficient conditions, indicating strong responsiveness to P fertilization. Conversely, genotypes ICG-8896 and ICGV-2032 maintained stable performance under P deficiency, demonstrating stress tolerance with low phosphorus stress factor (PSF) values ranging from 16.7% to 23.5%. Multivariate analyses revealed that physiological and yield-related traits were the principal contributors to total variation, with genotypes clustering into four and five distinct groups in Kano and Jigawa, respectively, based on their yield characteristics. The significant genotypic variation in the physiological traits reveals the existence of genetic diversity for physiological response under P stress. These findings highlight the importance of integrating advanced physiological phenotyping with agronomic evaluation in breeding programs targeting phosphorus use efficiency. The study recommends ICG-8896, ICGV-2032, and VMICGV-1,576,855 as low P tolerant genotypes for further breeding program.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Agronomic, physiological, and phosphorus use efficiency of groundnut (Arachis Hypogaea L.) genotypes under contrasting phosphorus environments

  • 期刊论文

  • 发表日期：

    2026年2月12日

查看全文
  • A. S. Shaibu,
  • A. I. Galadanchi,
  • A. A. Mustapha

摘要

This study evaluated 40 groundnut (Arachis hypogaea L.) genotypes under contrasting phosphorus (P) regimes to assess physiological responses, quantify agronomic performance, and identify phosphorus use-efficient (PUE) genotypes. Field trials were conducted at two locations (Kano and Jigawa states) in Northern Nigeria. Data were collected and included physiological, agronomic and photosynthetic efficiency parameters using a MultiSpeQ PhotosynQ 2.0 device. Results revealed significant genotypic variation (P < 0.05) and genotype × phosphorus application interaction for some physiological, yield, and P use efficiency traits. Pod yield ranged from 535 to 1,894 kg ha⁻¹, while kernel yield varied from 389 to 1,160 kg ha⁻¹ across treatments. Several genotypes, including ICG-13,603, ICGV-1,506,237, and VMICGV-1,576,855, exhibited high agronomic PUE values (> 13.0 kg grain kg⁻¹ P) under P-sufficient conditions, indicating strong responsiveness to P fertilization. Conversely, genotypes ICG-8896 and ICGV-2032 maintained stable performance under P deficiency, demonstrating stress tolerance with low phosphorus stress factor (PSF) values ranging from 16.7% to 23.5%. Multivariate analyses revealed that physiological and yield-related traits were the principal contributors to total variation, with genotypes clustering into four and five distinct groups in Kano and Jigawa, respectively, based on their yield characteristics. The significant genotypic variation in the physiological traits reveals the existence of genetic diversity for physiological response under P stress. These findings highlight the importance of integrating advanced physiological phenotyping with agronomic evaluation in breeding programs targeting phosphorus use efficiency. The study recommends ICG-8896, ICGV-2032, and VMICGV-1,576,855 as low P tolerant genotypes for further breeding program.

Graphical abstract