Scholarlink

<p>Direct-seeded rice cultivation encounters substantial challenges, during germination, owing to the submergence stress. The germination response under submergence conditions may be influenced by the nutrient status of the soil. This study investigates the haplotype-phenotype associations of 115 genetic variants in the <i>Trehalose-6-Phosphate Phosphatase 7</i> (<i>OsTPP7</i>) gene, a key determinant of anaerobic germination tolerance in rice, under combined submergence, nitrogen, and phosphorus deficiency stress at the germination stage. Among the <i>indica</i> subpopulations, significant Tajima's D (2.17*) and Fu and Li's F* value (1.80*) were observed in indx subpopulation. Furthermore, haplotype diversity (0.729) was found to be high in ind3 subpopulation. Among the 15 <i>OsTPP7</i> haplotypes, haplotype H002 showed superior performance for multiple traits, including root length, crown roots, shoot dry weight, and survival percentage under combined stress conditions. Additionally, two significant associations were identified, one in the exon (Chr09_12252673) and another in the 3' untranslated region (Chr09_12253933), accounting for &gt; 90% of phenotypic variance for survival percentage and root dry weight, respectively. A single non-synonymous SNP (Chr09_12253191: Ser305Arg) in the <i>japonica</i> allele significantly affected the shoot length and number of leaves under submergence conditions, as well as crown roots in control conditions. These findings indicate superior root growth associated with the favorable haplotype of the <i>OsTPP7</i> gene plays an important role in achieving higher survival percentage under nutrient-deficient submerged germination conditions.</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

Natural Variation in OsTPP7 Affects the Root Traits in Combined Germination Under Submergence and Nutrient Deficiency in indica Rice

  • 期刊论文

  • 发表日期：

    2026年2月25日

查看全文
  • Sabarinathan Selvaraj,
  • Subhashree Nayak,
  • Parameswaran Chidambaranathan,
  • Priyadarsini Sanghamitra,
  • Simanta Mohanty,
  • Cayalvizhi Balasubramaniasai,
  • Sanghamitra Samantaray

摘要

Direct-seeded rice cultivation encounters substantial challenges, during germination, owing to the submergence stress. The germination response under submergence conditions may be influenced by the nutrient status of the soil. This study investigates the haplotype-phenotype associations of 115 genetic variants in the Trehalose-6-Phosphate Phosphatase 7 (OsTPP7) gene, a key determinant of anaerobic germination tolerance in rice, under combined submergence, nitrogen, and phosphorus deficiency stress at the germination stage. Among the indica subpopulations, significant Tajima's D (2.17*) and Fu and Li's F* value (1.80*) were observed in indx subpopulation. Furthermore, haplotype diversity (0.729) was found to be high in ind3 subpopulation. Among the 15 OsTPP7 haplotypes, haplotype H002 showed superior performance for multiple traits, including root length, crown roots, shoot dry weight, and survival percentage under combined stress conditions. Additionally, two significant associations were identified, one in the exon (Chr09_12252673) and another in the 3' untranslated region (Chr09_12253933), accounting for > 90% of phenotypic variance for survival percentage and root dry weight, respectively. A single non-synonymous SNP (Chr09_12253191: Ser305Arg) in the japonica allele significantly affected the shoot length and number of leaves under submergence conditions, as well as crown roots in control conditions. These findings indicate superior root growth associated with the favorable haplotype of the OsTPP7 gene plays an important role in achieving higher survival percentage under nutrient-deficient submerged germination conditions.