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Subject: Genetics and Plant Breeding × Author: Babu, R × Author: KAU × End date: 1997 × Start date: 1997 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Seedling Progeny analysis in selected clones of Guinea grass (Panicum maximum Jacq.)
    (Department of Plant Breeding and Genetics, College of Agriculture, Vellayani, 1997) Babu, R; KAU; Suma Bai, D I
    A study was carried out at the Department of Plant Breeding and Genetics, College of Agriculture. Vellayani during July 1996 to May 1997 with the objective of ascertaining the seedling progeny behaviour in selected clones of guinea grass. A field experiment was conducted utilizing ten guinea grass clones available with All India Co- ordinated Research Project on Forage Crops to assess variability and identify three superior clones. Analysis of variance revealed significant difference for seven out of the eleven characters studied. The estimates of genotypic and phenotypic coefficient of variation were in general low for all the characters. Leaf area index recorded high heritability coupled with low genetic gain indicating non additive gene action. Correlation values of green fodder yield with all other characters were positive both at genotypic and phenotypic level. A selection index was formulated and three high yielding clones viz JHGG 96-3. JHGG 96-4 and Riversdale were selected and then subjected to progeny mean analysis along with two high yielding mutant clones viz Haritha and Marathakom in a compact family block design using seeds and slips. Marathakom recorded insignificant difference in variability with respect to two types of planting materials for ten out of the eleven characters studied, thus confirming the predominance of apomictic mode of reproduction and suitability to large scale seed production. Significant difference in variability was discernible in the remaining clones for more than one character indicating prevalence of sexual reproduction in these clones. Further studies on inheritance of percentage sexual reproduction in these clones would be desirable before embarking on large scale seed production.