Scholarlink

<p><i>Meloidogyne incognita</i> (RKN) is a major plant-parasitic nematode affecting Solanaceous vegetables globally. Its management is challenging due to its wide host range, genetic diversity, and lack of sustainable control measures. Hence, host plant resistance presents a viable and eco-friendly solution. However, resistance in Solanaceous crops, including eggplant, is often temperature-sensitive. This study explored the genetic inheritance of RKN resistance in eggplant under elevated soil temperatures (31–34&#xa0;°C). Six generations (<i>P</i><sub>1</sub>, <i>P</i><sub>2</sub>, <i>F</i><sub>1</sub>, <i>F</i><sub>2</sub>, <i>B</i><sub>1</sub>, and <i>B</i><sub>2</sub>) were developed using one heat-stable resistant line (IIHR-824) and two susceptible lines (VI046101 and IIHR-766). <i>F</i><sub>1</sub> hybrids from both crosses (IIHR-824 × VI046101 and IIHR-824 × IIHR-766) showed resistance. In <i>F</i><sub>2</sub> populations of IIHR-824 × VI046101, a 3:1 resistant-to-susceptible ratio indicated control by a single dominant gene. For IIHR-824 × IIHR-766, resistance was also conferred by a dominant gene, along with minor genes. Scaling tests revealed epistatic effects. In the IIHR-824 × VI046101 cross, a significant additive × additive (<i>i</i>) component and high additive (<i>d</i>) effect suggested good heterosis potential. In contrast, the IIHR-824 × IIHR-766 cross showed dominance (<i>h</i>) and a negative additive × additive (<i>i</i>) component, implying minor recessive gene involvement. Early generation selection is recommended to enhance resistance. This is the first study on the genetic inheritance of RKN resistance in eggplant, offering valuable insights to support the breeding of high-yielding, RKN-resistant cultivars.</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

Genetic analysis of resistance to root-knot nematode (Meloidogyne incognita) in eggplant (Solanum melongena L.)

  • 期刊论文

  • 发表日期：

    2025年6月13日

查看全文
  • Narayana Swamy Gujjala,
  • R. Umamaheswari,
  • Satyaprakash Barik,
  • Ponnam Naresh,
  • G. C. Acharya,
  • K. Madhavi Reddy,
  • D. C. Lakshmana Reddy,
  • H. A. Bhargavi,
  • T. H. Singh

摘要

Meloidogyne incognita (RKN) is a major plant-parasitic nematode affecting Solanaceous vegetables globally. Its management is challenging due to its wide host range, genetic diversity, and lack of sustainable control measures. Hence, host plant resistance presents a viable and eco-friendly solution. However, resistance in Solanaceous crops, including eggplant, is often temperature-sensitive. This study explored the genetic inheritance of RKN resistance in eggplant under elevated soil temperatures (31–34 °C). Six generations (P1, P2, F1, F2, B1, and B2) were developed using one heat-stable resistant line (IIHR-824) and two susceptible lines (VI046101 and IIHR-766). F1 hybrids from both crosses (IIHR-824 × VI046101 and IIHR-824 × IIHR-766) showed resistance. In F2 populations of IIHR-824 × VI046101, a 3:1 resistant-to-susceptible ratio indicated control by a single dominant gene. For IIHR-824 × IIHR-766, resistance was also conferred by a dominant gene, along with minor genes. Scaling tests revealed epistatic effects. In the IIHR-824 × VI046101 cross, a significant additive × additive (i) component and high additive (d) effect suggested good heterosis potential. In contrast, the IIHR-824 × IIHR-766 cross showed dominance (h) and a negative additive × additive (i) component, implying minor recessive gene involvement. Early generation selection is recommended to enhance resistance. This is the first study on the genetic inheritance of RKN resistance in eggplant, offering valuable insights to support the breeding of high-yielding, RKN-resistant cultivars.