Efectos de la putrescina en diferentes ciclos de selección masal divergente del maíz Harinoso Mosquera I Sin. 2 afectados por las heladas
Keywords:
Putrescina, Heladas, Prolificidad, Maíz (es)Downloads
En 1989, en el C.I. Tibaitata, en un ensayo de bloques al azar se aplicó: 0., 1000, 2000 Y 4000 Mm de Potrescina (Put) a los ciclos 6, 9, 12 Y 15 de subpoblaciones prolíficas y no prolíficas de maíz, que 6 horas antes habían sufrido los efectos de una helada (-1.50 C/4 hr). Como consecuencia del enfriamiento, el crecimiento en altura se suspendió, las mazorcas/planta florecidas que llenaron grano, y el reridimiento, disminuyeron; pero la Put aplicada revertió los daños causados por la helada, presentándose diferencias en la altura y rendimiento. Se destaca el ciclo 6 de la subpoblación prolífica, en el que con dosis de 1000, 2000 y 4000 Mm se obtuvieron rendimientos de ó.75, 5.24, y 5.ó3 Ton/ha. El maíz progenitor (ciclo 0) presentó una gran sensibilidad a la helada, y casi nula respuesta a Put.
During 1989, at the Tibaitata Research Center, an experiment plot was carried out. On cycles 6, 9, 12 and 15 of prolific and non prolific corn sub-populations which treated with 0, 1000, 2000 and 4000 Mm of putrescine. Six hours before aplication, the corn plants suffered chilling effects (-1.50 C/4 hr). As consecuence of chilling, the growth in height was suspended, the ear shoots and yield grain decreased. However putrescine application reverted the damage caused hy chilling and significative differences were observed in height and yield grain. Cicle 6 in prolific sub population was noticeable, in which 1000, 2000, and 4000 Mm of putrescine yielded 6.75, 5.24 and 5.63 Ton/ha. The Harinoso Mosquera I. Sin. 2 or cycle cero, showed a higber sensibility to chilling and the answer to putrescine application was almost negligeable.
How to Cite
APA
ACM
ACS
ABNT
Chicago
Harvard
IEEE
MLA
Turabian
Vancouver
Download Citation
Article abstract page views
Downloads
License
Copyright (c) 1990 Acta Biológica Colombiana
This work is licensed under a Creative Commons Attribution 4.0 International License.
The acceptance of manuscripts by the Journal implies its electronic edition of open Access under Creative Commons Attribution License 4.0, and the inclusion and diffusion of the complete text through the institutional repository of the Universidad Nacional de Colombia and in all the specialized data bases that the editor considers adequate for its indexation to increase Journal visibility.
Acta Biológica Colombiana allows authors to archive, download and distribute the final published version, as well as pre-print and post-print versions including a header with the bibliographic reference of published article. The journal encourages the authors to distribute the final versión through Internet, for example in their personal or institutional web pages, and scientific social networks.