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<p>Higher phytoglycogen in <i>Su1</i>-based sweetcorn kernels have created a niche market in Europe and Americas due to its distinct aroma, flavour and tenderness as well as plump and juicy texture over <i>Shrunken2</i> (<i>Sh2</i>)-based sweetcorn. Unavailability of diverse <i>Su1</i>-based inbreds poses challenge for <i>Su1</i>-based hybrid development. Here, we introgressed mutant <i>Su1</i> gene into four elite <i>Sh2</i>-based parental lines of two <i>Sh2</i>-based sweetcorn hybrids (PSSC-1 and PSSC-2) using molecular breeding in two backcrosses. <i>Su1</i>-based (SuDel36) and <i>Sh2</i>-based (SNP_AG1) markers were successfully used for foreground selection in backcross generations, that followed Mendelian segregation, although segregation distortion was observed in a few cases. More than 94% recurrent parent genome was recovered using SSR markers. <i>Su1</i>-based inbreds possessed significantly higher phytoglycogen (24.3%) over recurrent parents (5.6%). Across environments, <i>Su1</i>-based reconstituted hybrids also possessed higher phytoglycogen (25.8%) compared to original hybrids (5.5%). The <i>Su1</i>-based inbreds and hybrids possessed 14.4% and 13.9% sucrose, respectively. These inbreds and hybrids resembled their original versions for various agronomic traits. These newly developed <i>Su1</i>-based sweetcorn hybrids possess great potential in export markets, besides serving as a rich source of phytoglycogen in cosmetics, pharmaceuticals and nutraceuticals industries. This is the first report on development of phytoglycogen-enriched <i>Su1</i>-based sweetcorn hybrids using accelerated breeding. This is likely to promote broader industrial applications of phytoglycogen, thereby unveiling the underexplored potential of <i>Su1</i>-based sweet corn.</p>

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Enrichment of phytoglycogen in sweet corn kernels through genomics-assisted selection

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Rashmi Chhabra,
  • Rajkumar U. Zunjare,
  • Irum Gul,
  • Subhra J. Mishra,
  • Hriipulou Duo,
  • Vinay Bhatt,
  • Nisrita Gain,
  • Ravindra K. Kasana,
  • Vignesh Muthusamy,
  • Firoz Hossain

摘要

Higher phytoglycogen in Su1-based sweetcorn kernels have created a niche market in Europe and Americas due to its distinct aroma, flavour and tenderness as well as plump and juicy texture over Shrunken2 (Sh2)-based sweetcorn. Unavailability of diverse Su1-based inbreds poses challenge for Su1-based hybrid development. Here, we introgressed mutant Su1 gene into four elite Sh2-based parental lines of two Sh2-based sweetcorn hybrids (PSSC-1 and PSSC-2) using molecular breeding in two backcrosses. Su1-based (SuDel36) and Sh2-based (SNP_AG1) markers were successfully used for foreground selection in backcross generations, that followed Mendelian segregation, although segregation distortion was observed in a few cases. More than 94% recurrent parent genome was recovered using SSR markers. Su1-based inbreds possessed significantly higher phytoglycogen (24.3%) over recurrent parents (5.6%). Across environments, Su1-based reconstituted hybrids also possessed higher phytoglycogen (25.8%) compared to original hybrids (5.5%). The Su1-based inbreds and hybrids possessed 14.4% and 13.9% sucrose, respectively. These inbreds and hybrids resembled their original versions for various agronomic traits. These newly developed Su1-based sweetcorn hybrids possess great potential in export markets, besides serving as a rich source of phytoglycogen in cosmetics, pharmaceuticals and nutraceuticals industries. This is the first report on development of phytoglycogen-enriched Su1-based sweetcorn hybrids using accelerated breeding. This is likely to promote broader industrial applications of phytoglycogen, thereby unveiling the underexplored potential of Su1-based sweet corn.