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Phenotypical Expression of Maize Seedlings from Lines with the "Tallos Gemelos" Trait


Affiliations
1 Postgrado en Recursos Geneticos y Productividad-Genetica, Colegio de Postgraduados, Campus Montecillo, Km 36.5 Carretera Mexico-Texcoco, 56230 Montecillo, MEX, Mexico
2 Colegio de Postgraduados, Campus Puebla, Boulevard Forjadores de Puebla No. 205, Santiago Momoxpan, Municipio San Pedro Cholula Estado de Puebla, 72760 Puebla, PUE, Mexico
 

In the Colegio de Postgraduados in Mexico, we have generated lines of maize (Zea mays L.) with the particularity that from a seed two or more stalks emerge and develop normally, calling that character "tallos gemelos." This trait possibly modifies the proportions of the constituent tissues of the seed and could increase the nutritional and nutraceutical quality of the grain. The aim of this study was to evaluate the germination percentage and quantify and describe the types of phenotypic expression of seedling with twin stalks in the lines. 100 seeds of each of the 26 S5 lines tested were used. At 15 days after planting in a greenhouse, the seedlings were classified based on their morphology.The results showed that, on average, the lines had 81.3% of emergence and 51% of twin stalks. Eight types of phenotypic expression in seedlings were identified and described with the character "tallos gemelos"; Type II showed the highest proportion (59.5%). The phenotypical expressions identified in seedlings with the "tallos gemelos" trait are evidence of epigenetic mechanisms, since they present one of the features of epimutants, which is that they are reversible, that is; they can return to the original phenotype, in the present circumstance to normal plants (single stalk).
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  • Phenotypical Expression of Maize Seedlings from Lines with the "Tallos Gemelos" Trait

Abstract Views: 162  |  PDF Views: 17

Authors

Ma. Lorena Meraz-Fonseca
Postgrado en Recursos Geneticos y Productividad-Genetica, Colegio de Postgraduados, Campus Montecillo, Km 36.5 Carretera Mexico-Texcoco, 56230 Montecillo, MEX, Mexico
Ma. del Carmen Mendoza-Castillo
Postgrado en Recursos Geneticos y Productividad-Genetica, Colegio de Postgraduados, Campus Montecillo, Km 36.5 Carretera Mexico-Texcoco, 56230 Montecillo, MEX, Mexico
Takeo angel Kato-Yamakake
Postgrado en Recursos Geneticos y Productividad-Genetica, Colegio de Postgraduados, Campus Montecillo, Km 36.5 Carretera Mexico-Texcoco, 56230 Montecillo, MEX, Mexico
Adriana Delgado-Alvarado
Colegio de Postgraduados, Campus Puebla, Boulevard Forjadores de Puebla No. 205, Santiago Momoxpan, Municipio San Pedro Cholula Estado de Puebla, 72760 Puebla, PUE, Mexico

Abstract


In the Colegio de Postgraduados in Mexico, we have generated lines of maize (Zea mays L.) with the particularity that from a seed two or more stalks emerge and develop normally, calling that character "tallos gemelos." This trait possibly modifies the proportions of the constituent tissues of the seed and could increase the nutritional and nutraceutical quality of the grain. The aim of this study was to evaluate the germination percentage and quantify and describe the types of phenotypic expression of seedling with twin stalks in the lines. 100 seeds of each of the 26 S5 lines tested were used. At 15 days after planting in a greenhouse, the seedlings were classified based on their morphology.The results showed that, on average, the lines had 81.3% of emergence and 51% of twin stalks. Eight types of phenotypic expression in seedlings were identified and described with the character "tallos gemelos"; Type II showed the highest proportion (59.5%). The phenotypical expressions identified in seedlings with the "tallos gemelos" trait are evidence of epigenetic mechanisms, since they present one of the features of epimutants, which is that they are reversible, that is; they can return to the original phenotype, in the present circumstance to normal plants (single stalk).