Path Coefficient Analysis of Early Maturing Maize (Zea Mays) Inbred Lines in Central Rift Valley of Ethiopia
Issue:
Volume 5, Issue 3, May 2017
Pages:
47-50
Received:
13 May 2017
Accepted:
21 June 2017
Published:
22 August 2017
Abstract: This work was executed to work out direct and indirect effects of yield related traits on grain yield by path coefficient analysis in early maturing maize inbred lines. Hence, fifteen inbred lines were crossed in a diallel mating system. Two standard checks along with one candidate variety and hybrids were evaluated in Alpha Lattice Design with two replications at Melkassa Research Center. Path-coefficient analysis indicated that most traits; exerted positive direct effects on grain yield both at genotypic and phenotypic levels on grain yield. This suggests that grain yield could simultaneously be improved by selecting for these traits. In general, this study identified inbred lines and hybrid associations that had desirable expression of important traits. This will be useful for the selection of high yielding and early maturing hybrids for the location.
Abstract: This work was executed to work out direct and indirect effects of yield related traits on grain yield by path coefficient analysis in early maturing maize inbred lines. Hence, fifteen inbred lines were crossed in a diallel mating system. Two standard checks along with one candidate variety and hybrids were evaluated in Alpha Lattice Design with two...
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Study of Antagonistic Beneficial Microorganisms to Phytophtora colocasiae, Causal Agent of Taro Mildew (Colocasia esculenta (L.) Schott)
Asseng Charles Carnot,
Ebongo Lobe Emmanuel,
Nanda Djomou Giresse Ledoux,
Akono Ntonga Patrick,
Mbida Jean Arthur,
Ngono Ngane Annie,
Ambang Zachée,
Monkam Tchamaha Fabrice,
Djouokep Léonel Gautier
Issue:
Volume 5, Issue 3, May 2017
Pages:
51-60
Received:
14 July 2017
Accepted:
21 July 2017
Published:
22 August 2017
Abstract: The cultivation of taro is of great economic and social importance on a global scale. The current orientation towards agricultural production and the serious consequences of the mildew of taro to crops prompts to find alternatives to chemical control. This study aims at selecting in the taro habitat (leaves, rhizosphere) the microorganisms with high antagonistic potential capable of ensuring the biological control of P. colocasiae. Fungus isolated from the taro-infected leaves of the cultivar "Macumba or Ibo coco" from the V8-Agar medium, was kept in pure culture. The different antagonists were obtained by two trapping techniques using P. colocasiae as bait for the associated microorganisms and by the decimal dilution technique. The results reveal fourteen antagonist isolates, including five fungi and two bacteria isolated from the leaves; Against 4 bacteria and 3 fungi at ground level. Identification of the latter identified the presence of Penicillium Sp, Trichoderma Sp, Aspergillus Sp, Pythium Sp., Bacillus Sp, Rhizobium, Streptomyces and seven other unidentified isolates (Ni). The different in vitro tests showed that Rhizobium and Ni4 showed the strongest inhibitions (91.66 and 90.69%). The greenhouse tests showed the high-inhibitory effect of Trichoderma Sp. and Rhizobium, which showed very low foliar alteration percentages (9.65 and 1.86%). These antagonists would be of particular benefit to farmers in the development of biological pesticides.
Abstract: The cultivation of taro is of great economic and social importance on a global scale. The current orientation towards agricultural production and the serious consequences of the mildew of taro to crops prompts to find alternatives to chemical control. This study aims at selecting in the taro habitat (leaves, rhizosphere) the microorganisms with hig...
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