Physical, morphometric, and physiological quality of Dasylirion cedrosanum Trel. seeds in Viesca, state of Coahuila de Zaragoza
DOI:
https://doi.org/10.29298/rmcf.v17i97.1663Keywords:
Embryo, germination, provenance, sotol, intraspecific variation, viabilityAbstract
The quality of propagative material is a key factor in the regeneration and management of plant species. There is limited information on variations in quality between Dasylirion cedrosanum seeds from different natural localities or provenances. Within this context, the objective of this study was to evaluate the morphometric, physical, and physiological quality of D. cedrosanum seeds collected in four locations within Viesca municipality, state of Coahuila de Zaragoza, Mexico. Morphometric variables (length and width) and physical (pure seeds, empty seeds, inert matter, bulk density, and moisture content) and physiological quality parameters (viability, germination, abnormal seedlings, and ungerminated seeds) were analyzed. The results showed significant differences in seed size and physiological quality (p≤0.05) between localities, while some physical variables showed no variation. Viability ranged between 60 and 96 %, and germination, from 55 to 94 percent, with the highest values recorded at Rancho Grande. The linear regression between viability and germination was significant (p<0.001) and explained 56.8 % of the variation; therefore, the viability may indicate germination behavior. However, the presence of abnormal seedlings suggests that viability does not fully explain the physiological quality of the evaluated lots. Overall, the results show that the quality of propagation material varies across localities, highlighting the importance of selecting D. cedrosanum seed sources with high physiological performance for use in propagation and management programs in arid ecosystems.
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