Morphological changes in an inbred line of pearl millet selected for downy mildew resistance

    Rai, K N and Hanna, W W (1990) Morphological changes in an inbred line of pearl millet selected for downy mildew resistance. Journal of Genetics & Breeding, 44. pp. 199-202. ISSN 0394-9257

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    Abstract

    Downy mildew (Sclerospora graminicola) resistant Pennisetum glaucum [P. americanum] line 81B was developed by γ-irradiation of seeds of the highly susceptible line Tift 23d2B. A comparative study of the B-lines and their A-line (cytoplasmically male sterile) counterparts at Tifton (Georgia) and Patancheru (India) revealed significant differences between 81 and Tift 23d2 for 10 of the 14 common morphological characters evaluated. For days to 50% flowering and inflorescence length, differences between the 2 inbreds were in a similar direction at both locations, but for plant height and seed set differences at the 2 locations were inverse, and for number of internodes, leaf sheath length, peduncle length, number of effective tillers per plant, inflorescence diameter and seed mass, differences were significant either only at Tifton or only at Patancheru. There was also a significant difference between the 2 inbreds for internode length pattern. Thus, substantial morphological changes other than downy mildew resistance occurred in inbred 81 which could be due either to pleiotropic effects of the downy mildew resistance genes or to genetic changes at other loci. Introgression from resistant breeding material leading to concomitant changes in downy mildew resistance and morphological characteristics is also possible.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Millets
    Depositing User: Mr Charan Sai Ch
    Date Deposited: 26 Oct 2011 09:18
    Last Modified: 24 Jul 2018 10:08
    URI: http://oar.icrisat.org/id/eprint/2788
    Official URL:
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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