Scholarlink

<p>The robust root system of <i>Solanum chacoense</i> Bitt. (<i>Chc</i>) offers potential for improving nutrient use efficiency in potato breeding. This study investigated methods and traits associated with nitrogen uptake efficiency (NUpE) to facilitate the selection of superior <i>Chc</i> parents for developing improved potato varieties for two consecutive growing seasons. The objectives were to (1) determine correlations between phenotypic traits and nitrogen use efficiency (NUE) components in <i>Chc</i> genotypes, (2) evaluate the reliability of a greenhouse-based screening method for predicting field performance of NUE-related traits in <i>Chc</i>, and (3) identify <i>Chc</i> genotypes with superior NUpE for introgression into cultivated potato (<i>S. tuberosum</i>, <i>Tbr</i>) to improve NUE. Eight <i>Chc</i> genotypes and three <i>Tbr</i> cultivars (‘Atlantic’, ‘Elkton’, and ‘Harley Blackwell’) were grown in greenhouse and field environments under two nitrogen (N) application rates (84 and 168 kg ha⁻¹). Above-ground dry weight (AGDW), root and stolon dry weight (RSDW), tuber dry weight (TBDW), and total dry weight (TDW) were measured and correlated with N accumulation, NUpE, nitrogen utilization efficiency (NUtE), and NUE. AGDW and TDW in <i>Chc</i> were positively correlated with N accumulation, NUpE, and NUE in both environments over two years. Positive correlations for N accumulation and NUpE between greenhouse and field performance were observed for <i>Chc</i> genotypes in 2015, supporting the reliability of the greenhouse screening method. One <i>Chc</i> genotype (C-9) exhibited superior NUpE compared to the <i>Tbr</i> cultivar ‘Atlantic’ in both environments in the second season. These findings demonstrate the potential of using superior NUpE <i>Chc</i> parents for introgression into <i>Tbr</i> to develop potato cultivars with enhanced NUE.</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

Nitrogen Use Efficiency Components and Biomass Partitioning of Solanum Chacoense Across Growing Environments

  • 期刊论文

  • 发表日期：

    2025年8月29日

查看全文
  • Christian T. Christensen,
  • Lincoln Zotarelli,
  • Kathleen G. Haynes,
  • James C. Colee

摘要

The robust root system of Solanum chacoense Bitt. (Chc) offers potential for improving nutrient use efficiency in potato breeding. This study investigated methods and traits associated with nitrogen uptake efficiency (NUpE) to facilitate the selection of superior Chc parents for developing improved potato varieties for two consecutive growing seasons. The objectives were to (1) determine correlations between phenotypic traits and nitrogen use efficiency (NUE) components in Chc genotypes, (2) evaluate the reliability of a greenhouse-based screening method for predicting field performance of NUE-related traits in Chc, and (3) identify Chc genotypes with superior NUpE for introgression into cultivated potato (S. tuberosum, Tbr) to improve NUE. Eight Chc genotypes and three Tbr cultivars (‘Atlantic’, ‘Elkton’, and ‘Harley Blackwell’) were grown in greenhouse and field environments under two nitrogen (N) application rates (84 and 168 kg ha⁻¹). Above-ground dry weight (AGDW), root and stolon dry weight (RSDW), tuber dry weight (TBDW), and total dry weight (TDW) were measured and correlated with N accumulation, NUpE, nitrogen utilization efficiency (NUtE), and NUE. AGDW and TDW in Chc were positively correlated with N accumulation, NUpE, and NUE in both environments over two years. Positive correlations for N accumulation and NUpE between greenhouse and field performance were observed for Chc genotypes in 2015, supporting the reliability of the greenhouse screening method. One Chc genotype (C-9) exhibited superior NUpE compared to the Tbr cultivar ‘Atlantic’ in both environments in the second season. These findings demonstrate the potential of using superior NUpE Chc parents for introgression into Tbr to develop potato cultivars with enhanced NUE.