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Unraveling the association between cotton leafhopper Amrasca (Amrasca) biguttula and leaf morphological traits through stereo microscope and FESEM analysis

Indian Agricultural Research Journals

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Title Unraveling the association between cotton leafhopper Amrasca (Amrasca) biguttula and leaf morphological traits through stereo microscope and FESEM analysis
 
Creator MADHU, BANOTH
SIVAKUMAR, SUBBARAYAN
MANICKAM, SADASIVAM
MURUGAN, MARIMUTHU
RAJESWARI, SIVAKAMI
BOOPATHI, NARAYANAN MANIKANDA
 
Subject Cotton leafhopper, FESEM, Gossypol glands, Injury index, Trichomes
 
Description Present study was carried out during rainy (kharif) season of 2022 and summer season of 2023 at Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu to identify cotton (Gossypium hirsutum L.) genotypes with enhanced morphological traits to resist leafhopper [Amrasca (Amrasca) biguttula (Shiraki, 1912)] infestations. To achieve this, 5 distinct genotypes were selected as parents, generating 10 F1 hybrids using the half-diallel method. Field and polyhouse experiments were conducted over a 30–120 days-interval. Genotypes, environments, and their interactions (G × E) played a significant role in confirming resistance. Infestation levels varied throughout growth stages, with the highest at 60 DAS (days after sowing). Microscopy analysis revealed glandular trichomes (GTs) and more single-celled non- GTs (NGTs) with complex dendritic branches (2–8) on primary stem leaves. Negative correlations of trichome density, trichome length and gossypol glands with leafhopper populations in both environments suggested a deterrent role. Conversely, leaf thickness positively associated, indicating potential pest preference. Stepwise regression highlighted combination of morphological traits, significantly contributed to greater leafhopper resistance, rather than a single factor. These findings provide valuable insights for selecting and breeding resistant cotton genotypes against leafhoppers.
 
Publisher Indian Council of Agricultural Research
 
Date 2024-06-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJAgS/article/view/139557
10.56093/ijas.v94i6.139557
 
Source The Indian Journal of Agricultural Sciences; Vol. 94 No. 6 (2024); 583–588
2394-3319
0019-5022
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJAgS/article/view/139557/54731
https://epubs.icar.org.in/index.php/IJAgS/article/view/139557/54732
 
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https://creativecommons.org/licenses/by-nc-sa/4.0