标题:
Morphological Characterization and Phenological Modeling of Jatropha platyphylla (Euphorbiaceae) Muell. Arg. Genotypes
作者:
Edith Salazar-Villa, Martha Lidia Gutiérrez-Pérez, Federico Soto-Landeros, Karla Marina Báez-Parra, María de la Paz Sosa-Segura, Miguel Angel Angulo-Escalante
关键词:
Degree-Days, Monoecious, Phenological Modeling, Plant Breeding, Varietal Selection
期刊名称:
American Journal of Plant Sciences,
Vol.13 No.1,
January
13,
2022
摘要: 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 existence of monoecious plants,
finding individuals with male and female flowers in the same inflorescence.
Fruit with four seeds was also found. The phenological study was divided into
two phases and calculated in thermal requirement (°D): Vegetative [seedtime (0), germination (24), emergence (98),
cotyledons (87), second (302) and fourth (524) true leaves, end of vegetative
growth (302)] and reproductive [flowering (303), fructification (342),
maturation (126), defoliation and senescence (450)]. The thermal constant
(2558) was similar in all eight genotypes. The phenological stages and the
accumulated degree days were adjusted with a third-degree polynomial (Stage = -0.0041x3 + 0.7446x2 -8.6808x + 6.2448) (R2 = 0.99%) stage. The development of phenological models
facilitates the prediction of the flowering date for the selection of varieties
with high oil and protein content.