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<p>In a world grappling with climate change, the cultivation of C4 plants has emerged as a crucial strategy to combat global warming. Among these, sorghum stands out as a versatile and resilient C4 plant, playing a vital role in addressing climate change, malnutrition and poverty. However, the reliance on a single CMS source, such as the widely used <i>milo</i> (A<sub>1</sub>), poses risks to sorghum hybrids, as it is vulnerable to various challenges. To diversify CMS sources, the alternative CMS sources were explored in sorghum, including <i>maldandi</i> (A<sub>4</sub>), and aimed to identify restorers for these sources and their inheritance pattern. Through rigorous experimentation across multiple seasons, two resilient restorers, DSMR-8 and DSMR-4 were identified, on <i>maldandi</i>. These restorers demonstrated consistent and dominant fertility restoration, unaffected by environmental variations. Inheritance patterns were investigated across multiple generations, including F<sub>2</sub>, BC<sub>1</sub>F<sub>1</sub> and F<sub>3</sub> generations. In these generations 54F:10S, 1F:1S and 10(TF):44(SF):10(S) ratios were recorded, respectively, revealing a trigenic model of fertility restoration with three major genes, where at least two were required for fertility (duplicate-complementary). The consistency of this pattern across different generations and seasons emphasized the robustness of major fertility restoring genes. Furthermore, this study shed light on the role of minor genes and their sensitivity to environmental conditions, particularly moisture levels. Minor genes interacted with major genes and environmental factors to determine the degree of fertility restoration, leading to the diverse range of restoration classes observed. This research not only provides valuable insights into the complex genetics of fertility restoration in sorghum but also offers practical implications for sorghum breeding programs. It highlights the importance of major fertility restoring genes and the need to manage moisture levels during the reproductive stage for optimal seed set percentages.</p>

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Exploring resilient restorers on maldandi MS source (M31-2A): unraveling inheritance patterns and environmental effects on restorer genes

  • 期刊论文

  • 发表日期：

    2025年4月24日

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  • Lokesh Kumar Verma,
  • B. D. Biradar,
  • Prashant Kariyannanavar,
  • A. K. Meena,
  • S. S. Patil,
  • S. N. Chattannavar,
  • V. S. Kubsad

摘要

In a world grappling with climate change, the cultivation of C4 plants has emerged as a crucial strategy to combat global warming. Among these, sorghum stands out as a versatile and resilient C4 plant, playing a vital role in addressing climate change, malnutrition and poverty. However, the reliance on a single CMS source, such as the widely used milo (A1), poses risks to sorghum hybrids, as it is vulnerable to various challenges. To diversify CMS sources, the alternative CMS sources were explored in sorghum, including maldandi (A4), and aimed to identify restorers for these sources and their inheritance pattern. Through rigorous experimentation across multiple seasons, two resilient restorers, DSMR-8 and DSMR-4 were identified, on maldandi. These restorers demonstrated consistent and dominant fertility restoration, unaffected by environmental variations. Inheritance patterns were investigated across multiple generations, including F2, BC1F1 and F3 generations. In these generations 54F:10S, 1F:1S and 10(TF):44(SF):10(S) ratios were recorded, respectively, revealing a trigenic model of fertility restoration with three major genes, where at least two were required for fertility (duplicate-complementary). The consistency of this pattern across different generations and seasons emphasized the robustness of major fertility restoring genes. Furthermore, this study shed light on the role of minor genes and their sensitivity to environmental conditions, particularly moisture levels. Minor genes interacted with major genes and environmental factors to determine the degree of fertility restoration, leading to the diverse range of restoration classes observed. This research not only provides valuable insights into the complex genetics of fertility restoration in sorghum but also offers practical implications for sorghum breeding programs. It highlights the importance of major fertility restoring genes and the need to manage moisture levels during the reproductive stage for optimal seed set percentages.