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<p>Cotton-melon aphid, <i>Aphis gossypii</i> Glover, impedes cotton production in tropical and subtropical climates. Host plant resistance, the foundation of integrated pest management, favored lowering the aphid problem on numerous crops at a lower cost and more sustainably. The first step in producing aphid-resistant cotton genotypes for large-scale cultivation is to choose acceptable parental genomes with aphid resistance and good agronomic features. Choosing genotypes needs prior understating regarding the interactions between the genotypes and aphids. The morpho-physiological characteristics of host plants influence insect preferences and performance. Eighty-seven <i>G. arboreum</i> L. and twenty <i>G. hirsutum</i> L. genotypes were screened for aphid resistance and morpho-physio characteristics to find genotypes that can be launched into the aphid resistance breeding program. Field testing revealed that <i>G. arboreum</i> genotypes AKA 2008-7, FDX235, CNA 2009, PAIG 380, SV385, and others were resistant to <i>A. gossypii</i> and had desirable morphometric features reducing aphid development. On principal component 1, the significant contributing variables, leaf length, width, area, thickness, and aphid count, had Eigenvalues more significant than one, meaning a total variance of 100%. The two-dimensional and multivariate biplot results indicated that most morpho-physio characteristics in <i>G. arboreum</i> favored aphid resistance. In morphotype clustering, genotypes of <i>G. arboreum</i> and <i>G. hirsutum</i> formed independent clustering, showing that both species are extraordinarily different, with a significant possibility for varietal development through interspecific hybridization procedures. The highly performing aphid-resistant <i>G. arboreum</i> genotypes shall be subjected to high-throughput plant phenomics screening approaches, such as cutting-edge sensors and imaging technologies, to comprehend and develop novel cotton cultivars.</p>

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Multivariate principal component analysis reveals key clusters of morpho-physiological traits in Gossypium hirsutum and G. arboreum resisting Aphis gossypii infestation

  • 期刊论文

  • 发表日期：

    2026年2月4日

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  • Uthirapathy Pirithiraj,
  • Marimuthu Murugan,
  • Venkatasamy Balasubramani,
  • Narayanan Manikanda Boopathi,
  • Selladurai Hari Ramakrishnan,
  • Mannu Jayakanthan,
  • Nallathambi Premalatha

摘要

Cotton-melon aphid, Aphis gossypii Glover, impedes cotton production in tropical and subtropical climates. Host plant resistance, the foundation of integrated pest management, favored lowering the aphid problem on numerous crops at a lower cost and more sustainably. The first step in producing aphid-resistant cotton genotypes for large-scale cultivation is to choose acceptable parental genomes with aphid resistance and good agronomic features. Choosing genotypes needs prior understating regarding the interactions between the genotypes and aphids. The morpho-physiological characteristics of host plants influence insect preferences and performance. Eighty-seven G. arboreum L. and twenty G. hirsutum L. genotypes were screened for aphid resistance and morpho-physio characteristics to find genotypes that can be launched into the aphid resistance breeding program. Field testing revealed that G. arboreum genotypes AKA 2008-7, FDX235, CNA 2009, PAIG 380, SV385, and others were resistant to A. gossypii and had desirable morphometric features reducing aphid development. On principal component 1, the significant contributing variables, leaf length, width, area, thickness, and aphid count, had Eigenvalues more significant than one, meaning a total variance of 100%. The two-dimensional and multivariate biplot results indicated that most morpho-physio characteristics in G. arboreum favored aphid resistance. In morphotype clustering, genotypes of G. arboreum and G. hirsutum formed independent clustering, showing that both species are extraordinarily different, with a significant possibility for varietal development through interspecific hybridization procedures. The highly performing aphid-resistant G. arboreum genotypes shall be subjected to high-throughput plant phenomics screening approaches, such as cutting-edge sensors and imaging technologies, to comprehend and develop novel cotton cultivars.