Assessing the mutagenic effects of gamma irradiation on Cajanus cajan (L.) Huth and Vigna unguiculata (L.) Walp landraces using morphological markers

Giving the high adaptability, heritability, genetic variability and nutritive values reported in the indigenous landraces of legumes, combined efforts should be geared towards their improvement. The present study aimed at evaluating the sensitivity of “Fiofio” Cajanus cajan (L.) Huth and “Olaudi” Vi...

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Veröffentlicht in:Comunicata Scientiae 2012, Vol.3 (4), p.271-281
Hauptverfasser: Ekpenyong, Ekpe Daniel, Victor Ikpeme, Ekei, Udensi Ugorji, Ogbuagu, Abebe Obu, Joseph
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Sprache:eng ; por
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Zusammenfassung:Giving the high adaptability, heritability, genetic variability and nutritive values reported in the indigenous landraces of legumes, combined efforts should be geared towards their improvement. The present study aimed at evaluating the sensitivity of “Fiofio” Cajanus cajan (L.) Huth and “Olaudi” Vigna unguiculata (L.) Walp to gamma irradiation using morphological markers. Seeds of these legumes were exposed to gamma irradiation at 0, 200, 400, 600, 800 Gy from 60Co source. There was significant effect of gamma irradiation on days to 50% seedling emergence in a dosedependent fashion for “Fiofio” but it did not significantly affect the seedling emergence of “Olaudi”. Germination percentage was not affected concerning the two crops but the survival percentage was significantly reduced as the dose of exposure increased, especially for “Fiofio” variety. Growth and yield traits were increased in plants raised from seeds exposed to 200 Gy of gamma irradiation for both legumes. “Fiofio” plants raised from seeds treated with 400, 600 and 800 Gyhave died after two months, while those of “Olaudi” have presented a retarded growth. Explicitly, exposing the seeds of these legumes to 200 Gy of gamma irradiation could serve as a good springboard for their improvement. Dadas as elevadas adaptabilidade, hereditariedade, variabilidade genética e valores nutritivos relatados nas raças autóctones de leguminosas, os esforços combinados devem ser orientadas para a sua melhoria. O presente estudo teve como objetivo avaliar a sensibilidade de feijão guandu Cajanus cajan (L.) Huth e “Olaudi” Vigna unguiculata (L.) Walp à irradiação gama, utilizando marcadores morfológicos. As sementes destas vagens foram expostas a irradiação gama de 0, 200, 400, 600, 800 Gy a partir de fonte de 60Co. Houve efeito significativo da irradiação gama em dias com a emergência de 50% das sementes em uma dose-dependente para “Fiofio”, mas isto não afetou significativamente a emergência de plântulas de “Olaudi”. A percentagem de germinação não foi afetada naquilo que se refere às duas culturas, mas a percentagem de sobrevivência foi significativamente reduzida à medida quea houve aumento da dose de exposição, especialmente para a variedade “Fiofio”. Características de crescimento e rendimento foram aumentadas em plantas cultivadas a partir de sementes expostas a 200 Gy de radiação gama para ambos os legumes. Plantas “Fiofio” oriundas de sementes tratadas com 400, 600 e 800Gy morreram depois de dois meses,
ISSN:2177-5133
2177-5133