Cytoplasmic male-sterility and source of pollen influence the expression of resistance to sorghum midge,Stenodiplosis sorghicola

    Sharma, H C (2001) Cytoplasmic male-sterility and source of pollen influence the expression of resistance to sorghum midge,Stenodiplosis sorghicola. Euphytica, 122 (2). pp. 391-395. ISSN 0014-2336

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    Abstract

    Sorghum midge, Stenodiplosis (Contarinia) sorghicola (Coquillett), is an important pest of grain sorghum, and host plant resistance is an important aspect of control of this pest. This research investigated how cytoplasmic male-sterility and source of pollen influence the expression of resistance to sorghum midge. Sorghum midge emergence was significantly lower in panicles of midge-resistant and midge-susceptible cytoplasmic male-sterile lines when pollinated with AF 28 - a midge-resistant restorer line, than those pollinated with Swarna - a midge susceptible restorer line, indicating the presence of xenia effects. Maintainer lines (B-lines) of midge-resistant parents had significantly lower numbers of eggs and larvae than the B-lines of midge-susceptible parents. Male-sterile lines of the both midge-resistant and midge-susceptible lines were equally susceptible, indicating that resistance to sorghum midge is influenced by factors in the cytoplasm of the B-line. These findings will have an important bearing on the production of hybrids with resistance to insects.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: plant resistance, pollen effects, resistance mechanisms, Sorghum bicolor, Stenodiplosis sorghicola,sorghum midge
    Subjects: Mandate crops > Sorghum
    Depositing User: Mr Sanat Kumar Behera
    Date Deposited: 08 Oct 2011 07:13
    Last Modified: 08 Oct 2011 07:13
    URI: http://oar.icrisat.org/id/eprint/2081
    Official URL: http://dx.doi.org/10.1023/A:1012995409298
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: I thank Dr Rodomiro Ortiz for his constructive comments, and Mr D. Krishna and Mr V.V. Rao for their help in carrying out these experiments.
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