Gene action of blast disease reaction and grain yield traits in finger millet

    Manyasa, E O and Tongoona, P and Shanahan, P and Githiri, S and Ojulong, H and Rathore, A (2019) Gene action of blast disease reaction and grain yield traits in finger millet. In: Africa Plant Breeders Association conference, 23-25 Oct 2019, Accra, Ghana.

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    Abstract

    Gene action of blast reaction, yield and yield associated traits in finger millet were studied using a 4x4 North Carolina Design II mating scheme. The four female and four male parents and their 16 crosses were evaluated at Alupe and Kakamega in western Kenya in a randomized complete block design under both artificially induced and natural disease pressure. General combining ability (GCA) and specific combining ability (SCA) estimates of the traits were calculated to determine the genotypes breeding value. The GCA variance predominated over SCA variance for all traits except finger width hence these traits can be improved through selection. With high, desirable GCA effects, male parent KNE 392 and female parents KNE 744 and IE 11 are suitable for blast resistance breeding while male parent Okhale 1 is suitable for grain yield improvement. The frequency distribution for the segregating F2 generation for the three blast types differed within and between crosses which could be due to differences in gene numbers or gene combinations being expressed in the different parents used. Convergent crossing or gene pyramiding for durable resistance could be possible.

    Item Type: Conference or Workshop Item (Poster)
    Divisions: Research Program : East & Southern Africa
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Finger Millet, Blast Disease
    Subjects: Mandate crops > Millets > Finger Millet
    Others > Genetics and Genomics
    Others > Plant Disease
    Depositing User: Mr Arun S
    Date Deposited: 04 Apr 2020 05:02
    Last Modified: 04 Apr 2020 05:02
    URI: http://oar.icrisat.org/id/eprint/11449
    Acknowledgement: This work was supported by HOPE project
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