Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize
The maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), is among the major storage pests that enhance food insecurity among maize farmers. New sources of resistance to the maize weevil are critical in a successful breeding program to address grain damage by postharvest pests. The objective of the study was to evaluate resistance in maize genotypes to the maize weevil, and consequently their value for use in breeding programs. A total of 175 genotypes, including hybrids, landraces, open-pollinated varieties and checks, were tested for resistance to the maize weevil. The percentage grain damage, weight loss, flour weight and weight of damaged and undamaged grains were measured. Significant differences (P <0.001) were observed among the genotypes for all the traits evaluated. The distribution of the genotypes among the different categories of resistance was an indication of the existence of genetic variation. The most resistant genotypes were CKPH08003 and BRAZ 2451 while the most susceptible were PH 3254 and BRAZ 4, among the hybrids and landraces respectively. Genotypes that were superior to the resistant checks were identified. The percentage weight loss and flour weight were identified as the most important insect-resistance traits for discriminating genotypes as evident from the canonical discriminant analysis. Correlation coefficients among the traits evaluated were highly significant. The resistant hybrids identified can be recommended for release and adoption by farmers, whereas the resistant landraces can act as sources of resistance for use in breeding programs.
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Canadian Center of Science and Education
2012
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Subjects: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, Maize Weevil, Postharvest Pests, MAIZE, CURCULIONIDAE, SITOPHILUS ZEAMAIS, STORED PRODUCTS PESTS, PEST RESISTANCE, TROPICAL ZONES, |
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dig-cimmyt-10883-31772023-12-04T14:33:36Z Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize Mwololo, J.K. Mugo, S.N. Okori, P. Tadele Tefera Otim, M. Munyiri, S.W. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Weevil Postharvest Pests MAIZE CURCULIONIDAE SITOPHILUS ZEAMAIS STORED PRODUCTS PESTS PEST RESISTANCE TROPICAL ZONES The maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), is among the major storage pests that enhance food insecurity among maize farmers. New sources of resistance to the maize weevil are critical in a successful breeding program to address grain damage by postharvest pests. The objective of the study was to evaluate resistance in maize genotypes to the maize weevil, and consequently their value for use in breeding programs. A total of 175 genotypes, including hybrids, landraces, open-pollinated varieties and checks, were tested for resistance to the maize weevil. The percentage grain damage, weight loss, flour weight and weight of damaged and undamaged grains were measured. Significant differences (P <0.001) were observed among the genotypes for all the traits evaluated. The distribution of the genotypes among the different categories of resistance was an indication of the existence of genetic variation. The most resistant genotypes were CKPH08003 and BRAZ 2451 while the most susceptible were PH 3254 and BRAZ 4, among the hybrids and landraces respectively. Genotypes that were superior to the resistant checks were identified. The percentage weight loss and flour weight were identified as the most important insect-resistance traits for discriminating genotypes as evident from the canonical discriminant analysis. Correlation coefficients among the traits evaluated were highly significant. The resistant hybrids identified can be recommended for release and adoption by farmers, whereas the resistant landraces can act as sources of resistance for use in breeding programs. 206-215 2013-06-30T05:24:47Z 2013-06-30T05:24:47Z 2012 Article 1916-9752 http://hdl.handle.net/10883/3177 10.5539/jas.v4n11p206 English CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose. Open Access PDF Canadian Center of Science and Education http://www.ccsenet.org/journal/index.php/jas/article/view/19205 11 4 Journal of Agricultural Science |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Weevil Postharvest Pests MAIZE CURCULIONIDAE SITOPHILUS ZEAMAIS STORED PRODUCTS PESTS PEST RESISTANCE TROPICAL ZONES AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Weevil Postharvest Pests MAIZE CURCULIONIDAE SITOPHILUS ZEAMAIS STORED PRODUCTS PESTS PEST RESISTANCE TROPICAL ZONES |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Weevil Postharvest Pests MAIZE CURCULIONIDAE SITOPHILUS ZEAMAIS STORED PRODUCTS PESTS PEST RESISTANCE TROPICAL ZONES AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Weevil Postharvest Pests MAIZE CURCULIONIDAE SITOPHILUS ZEAMAIS STORED PRODUCTS PESTS PEST RESISTANCE TROPICAL ZONES Mwololo, J.K. Mugo, S.N. Okori, P. Tadele Tefera Otim, M. Munyiri, S.W. Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize |
description |
The maize weevil, Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), is among the major storage pests that enhance food insecurity among maize farmers. New sources of resistance to the maize weevil are critical in a successful breeding program to address grain damage by postharvest pests. The objective of the study was to evaluate resistance in maize genotypes to the maize weevil, and consequently their value for use in breeding programs. A total of 175 genotypes, including hybrids, landraces, open-pollinated varieties and checks, were tested for resistance to the maize weevil. The percentage grain damage, weight loss, flour weight and weight of damaged and undamaged grains were measured. Significant differences (P <0.001) were observed among the genotypes for all the traits evaluated. The distribution of the genotypes among the different categories of resistance was an indication of the existence of genetic variation. The most resistant genotypes were CKPH08003 and BRAZ 2451 while the most susceptible were PH 3254 and BRAZ 4, among the hybrids and landraces respectively. Genotypes that were superior to the resistant checks were identified. The percentage weight loss and flour weight were identified as the most important insect-resistance traits for discriminating genotypes as evident from the canonical discriminant analysis. Correlation coefficients among the traits evaluated were highly significant. The resistant hybrids identified can be recommended for release and adoption by farmers, whereas the resistant landraces can act as sources of resistance for use in breeding programs. |
format |
Article |
topic_facet |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Maize Weevil Postharvest Pests MAIZE CURCULIONIDAE SITOPHILUS ZEAMAIS STORED PRODUCTS PESTS PEST RESISTANCE TROPICAL ZONES |
author |
Mwololo, J.K. Mugo, S.N. Okori, P. Tadele Tefera Otim, M. Munyiri, S.W. |
author_facet |
Mwololo, J.K. Mugo, S.N. Okori, P. Tadele Tefera Otim, M. Munyiri, S.W. |
author_sort |
Mwololo, J.K. |
title |
Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize |
title_short |
Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize |
title_full |
Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize |
title_fullStr |
Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize |
title_full_unstemmed |
Sources of resistance to the maize weevil Sitophilus Zeamais in tropical maize |
title_sort |
sources of resistance to the maize weevil sitophilus zeamais in tropical maize |
publisher |
Canadian Center of Science and Education |
publishDate |
2012 |
url |
http://hdl.handle.net/10883/3177 |
work_keys_str_mv |
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1787232861962633216 |