American Journal of Plant Sciences, 2022, 13, 23-35 https://www.scirp.org/journal/ajps ISSN Online: 2158-2750 ISSN Print: 2158-2742 DOI: 10.4236/ajps.2022.131002 Jan. 13, 2022 23 American Journal of Plant Sciences Morphological Characterization and Phenological Modeling of Jatropha platyphylla (Euphorbiaceae) Muell. Arg. Genotypes Edith Salazar-Villa 1 , Martha Lidia Gutiérrez-Pérez 2 , Federico Soto-Landeros 3 , Karla Marina Báez-Parra 4 , María de la Paz Sosa-Segura 5 , Miguel Angel Angulo-Escalante 1* 1 Centro de Investigación en Alimentación y Desarrollo AC, Culiacán, México 2 Facultad de Agronomía, Universidad Autónoma de Sinaloa, Culiacán, México 3 Instituto Tecnológico Superior de Guasave, Guasave, México 4 Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacán, México 5 Colegio de Bachilleres del Estado de Sinaloa, Culiacán, México Abstract Morphological characterization and phenological modeling were carried out on genotypes of Jatropha platyphylla collected from the states of Sinaloa and Durango, Mexico. The morphological characterization evidenced the exis- tence of monoecious plants, finding individuals with male and female flowers in the same inflorescence. Fruit with four seeds was also found. The pheno- logical study was divided into two phases and calculated in thermal require- ment (˚D): Vegetative [seedtime (0), germination (24), emergence (98), coty- ledons (87), second (302) and fourth (524) true leaves, end of vegetative growth (302)] and reproductive [flowering (303), fructification (342), matu- ration (126), defoliation and senescence (450)]. The thermal constant (2558) was similar in all eight genotypes. The phenological stages and the accumu- lated degree days were adjusted with a third-degree polynomial (Stage = -0.0041x 3 + 0.7446x 2 - 8.6808x + 6.2448) (R 2 = 0.99%) stage. The develop- ment of phenological models facilitates the prediction of the flowering date for the selection of varieties with high oil and protein content. Keywords Degree-Days, Monoecious, Phenological Modeling, Plant Breeding, Varietal Selection How to cite this paper: Salazar-Villa, E., Gutiérrez-Pérez, M.L., Soto-Landeros, F., Báez-Parra, K.M., Sosa-Segura, M.P. and Angulo-Escalante, M.A. (2022) Morpho- logical Characterization and Phenological Modeling of Jatropha platyphylla (Euphor- biaceae) Muell. Arg. Genotypes. American Journal of Plant Sciences, 13, 23-35. https://doi.org/10.4236/ajps.2022.131002 Received: October 2, 2021 Accepted: January 10, 2022 Published: January 13, 2022 Copyright © 2022 by author(s) and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access