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<p>The micromorphology of the leaf surfaces in hybrid plants and their parents was studied using cryo-scanning electron microscopy (cryo-SEM). We used four advanced-generation lines derived from × <i>Trititrigia</i> × <i>Thinopyrum junceum</i> lines (hereafter, f-hybrids) and three wheat–wheatgrass hybrids with a wheat-like karyotype/phenotype (WWH) were used as maternal and paternal plants, respectively, in the crosses. Hybrids of the eighth and ninth seed generations (F<sub>8</sub> and F<sub>9</sub>) were studied. The micrographs assessed the presence of micromorphological structures such as prickles, hairs, and silica cells, in the costal and intercostal zones on the abaxial and adaxial surfaces of the leaves. A total of 18 traits specific to maternal plants and 19 traits specific to paternal plants were studied in the hybrid plant sample. Among the hybrid plants, maternal and paternal traits occurred in various combinations. Conversely, the traits of maternal and paternal plants generally correlated negatively with one another, though they correlated positively with varying degrees of strength with the traits within each group. About half of the hybrid plants displayed at least one specific maternal trait; in roughly a third of these cases, the trait occurred rarely. One of the most typical maternal and <i>Th. junceum</i> traits, small shield-like prickles (prickles with a short barb), was observed in 45% of the hybrid plants. Meanwhile, at least one of the studied paternal traits was observed in all hybrid plants. Consequently, in the micromorphology of the leaf surface of hybrid plants, the paternal traits of wheat-like WWH predominated.</p>

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Patterns of parental trait association on the leaf surface of wheat hybrids with Thinopyrum junceum ancestry

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • A. V. Babosha,
  • P. O. Loshakova,
  • D. A. Shchelkanov,
  • A. D. Alenicheva,
  • M. M. Gevorkyan,
  • A. A. Pogost,
  • G. I. Komarova

摘要

The micromorphology of the leaf surfaces in hybrid plants and their parents was studied using cryo-scanning electron microscopy (cryo-SEM). We used four advanced-generation lines derived from × Trititrigia × Thinopyrum junceum lines (hereafter, f-hybrids) and three wheat–wheatgrass hybrids with a wheat-like karyotype/phenotype (WWH) were used as maternal and paternal plants, respectively, in the crosses. Hybrids of the eighth and ninth seed generations (F8 and F9) were studied. The micrographs assessed the presence of micromorphological structures such as prickles, hairs, and silica cells, in the costal and intercostal zones on the abaxial and adaxial surfaces of the leaves. A total of 18 traits specific to maternal plants and 19 traits specific to paternal plants were studied in the hybrid plant sample. Among the hybrid plants, maternal and paternal traits occurred in various combinations. Conversely, the traits of maternal and paternal plants generally correlated negatively with one another, though they correlated positively with varying degrees of strength with the traits within each group. About half of the hybrid plants displayed at least one specific maternal trait; in roughly a third of these cases, the trait occurred rarely. One of the most typical maternal and Th. junceum traits, small shield-like prickles (prickles with a short barb), was observed in 45% of the hybrid plants. Meanwhile, at least one of the studied paternal traits was observed in all hybrid plants. Consequently, in the micromorphology of the leaf surface of hybrid plants, the paternal traits of wheat-like WWH predominated.