Componential analysis of plant morphological factors associated with sorghum resistance to shoot fly Atherigona soccata Rondani

    Darbha, Subrahmanyam (1997) Componential analysis of plant morphological factors associated with sorghum resistance to shoot fly Atherigona soccata Rondani. Masters thesis, Acharya N G Ranga Agricultural University.

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    Supervisors

    Supervisors NameSupervisors ID
    Reddy, D D RANGRAU
    Reddy, B V SICRISAT
    Gour, T BANGRAU
    Mohan Kumar, K CANGRAU

    Abstract

    Investigation on the "Componential analysis of plant morphological factors associated with sorghum resistance to shoot fly Arlterigona soccara Rondani," was carried out at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Patancheru, Andhra Pradesh, India during kharif '96. The effect of morphological factors on shoot fly resistance was studied by considering thiny genotypes having a varied breeding background. The morphological factors viz., mesocotyl length, seedling vigor, glossy score, 4" leaf parameters (length, width and drooping depth), trichomes on 5" leaf (abaxial and adaxial surfaces) and leaf surface wetness (LSW) were studied in relation to shoot fly parameters (egg count and deadheart per cent). Seedling vigor, glossy score and shoot fly parameters were studied under field conditions in two sowings during kharif '96. Mesocotyl length, leaf parameters, trichomes on the leaf surface and leaf surface wetness were studied under laboratory conditions. The data obtained was analyzed for mean performance of individual genotypes, and groups of genotypes for various factors and the study of correlations and inter-relationships of various morphological factors on shoot fly resistance parameters using path coefficient analysis. The mean performance of all the genotypes across the morphological traits studied for shoot fly resistance indicated that shoot fly resistant sources (IS 1054, IS 1057. and IS 18551) and Bred resistant B lines (SPSFR 94001 B. SPSFR 94003 B. SPSFR 94031 B, SPSFPR 94002 B and SPSFF'R 94005 B had desirable morphological features which resulted in lower deadheart per cent. Genotypes IS 18551, ICSV 705, SPSFR 94031, and SPSFPR 94005 B performed consistently in both the sowings and were found to be most resistant to shoot fly, of all the genotypes studied.

    Item Type: Thesis (Masters)
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Sorghum
    Depositing User: Users 6 not found.
    Date Deposited: 30 Aug 2011 05:45
    Last Modified: 03 Sep 2011 14:14
    URI: http://oar.icrisat.org/id/eprint/669
    Acknowledgement: I would like to express gratitude to my major advisor, Dr. D.D.R. Reddy. Senior Scientist and University Head of Entomology for his valuable advice throughout the port.graduation and during the preparation of this manuscript. Gratitude is expressed to Dr. ffinayo F. Nwarue. Principal Entomologist ICRISAT, for serving as Co- Chairman before his leaving for West African Rice Development Association (WARDA) as Director General. Appreciation is extended to Dr. Nwanze for inspiring me to further research. Sincere thanks to Dr. Belum V.S. Reddy, Senior Scientist in Genetic Enhancement Division, ICRISAT and advisory committee member, for his helpful suggestions regarding breeding aspects and reviewing of this manuscript. I am thankful to Dr. T. B. Gour. Assoc. Prof, of Enotmology, and Dr. K. C. Mohan Kumar. Assoc. Prof, and Head of Agri-microbiology & Bio-energy for serving as members on the advisory committee and for their support during the course of this investigation. Sincerely thankful to Mlss. Rukmini and Mn. Madhurl for their understanding and forbearance during the project work. Gratitude is expressed to the cereals entomology staff of ICRlSAT for their kind help in recording observations and during my stay at ICRISAT. Appreciation is due to all my friends and colleagues both at college and ICRISAT who have been a great source of suppon. Lastly, I should be highly thankful to Acharya N.G. Ranga Agricultural University for offering financial suppon throughout the Masters program.
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