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Description of the first stage of the life cycle of three genotypes of Leucocoryne sp.: seed to bulb
This study describes the stage from seed to bulb of plants of Leucocoryne sp. cultivated in Quillota, V Region, Chile (32°53' S lat; 71°16' W long). The genotypes used were Leucocoryne purpurea Gay, Leucocoryne sp. ecotype Talinay, and Leucocoryne sp. ecotype Alcones, all originated in the...
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Published in: | Agricultura técnica 2004-06, Vol.64 (2) |
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Main Authors: | , |
Format: | Article |
Language: | Spanish |
Subjects: | |
Online Access: | Get full text |
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Summary: | This study describes the stage from seed to bulb of plants of
Leucocoryne sp. cultivated in Quillota, V Region, Chile (32°53' S
lat; 71°16' W long). The genotypes used were Leucocoryne purpurea
Gay, Leucocoryne sp. ecotype Talinay, and Leucocoryne sp. ecotype
Alcones, all originated in the IV Region, Chile. Two hundred random
seeds per genotype were weighed and sown on each of three dates:
September, October and November of 1998. After emergence, six random
individuals were sampled every two weeks to observe number and leaf
shape; days to the beginning of bulb formation and senescence; maximum
length (LH), leaf surface area (AF) and leaf dry matter (MSH); and bulb
dry matter (MSB), fresh weight (PFB) and diameter (DB). Independent of
the genotype or sowing date, only the cotyledon leaf was formed; bulb
formation began between 35 to 49 days, and the plants senescence
occurred at 91 days. The average ranges were 0.7-1.8 mg seed-1 for seed
weight, 4.9-7.0 cm leaf-1 for LH, 78.6-125.8 mm2 leaf-1 for AF, 1.4-2.6
mg hoja-1 for MSH, 11.2-23.0 mg bulb-1 MSB, 38.0-87.7 mg bulb-1 PFB,
and 3.8-5.0 mm bulb-1 for DB. In all cases the smallest values
corresponded to Leucocoryne sp. ecotype Talinay, and the largest to the
Leucocoryne sp. ecotype Alcones. These results suggest that the
differences have a strong genetic component. It was not possible to
obtain flowering bulbs (PFB > 0.3 g bulb-1) in this first stage.
Este trabajo describe la etapa de semilla a bulbo de plantas de
Leucocoryne sp. cultivadas en Quillota, V Región, Chile
(32°53' lat. Sur; 71°16' long. Oeste). Los genotipos
utilizados fueron Leucocoryne purpurea Gay, Leucocoryne sp. ecotipo
Talinay y Leucocoryne sp. ecotipo Alcones, todos originados de la IV
Región, Chile. Doscientas semillas por genotipo se pesaron y
sembraron en cada una de tres fechas de siembra: septiembre, octubre y
noviembre de 1998. A partir de la emergencia, cada dos semanas se
tomó una muestra al azar de seis individuos para observar
número y forma de la hoja; días a inicio de la
bulbificación y senescencia; máxima longitud de la hoja (LH),
área foliar (AF) y materia seca de la hoja (MSH); y materia seca
(MSB), peso fresco (PFB) y diámetro (DB) del bulbo. Independiente
del genotipo o fecha de siembra sólo se formó la hoja
cotiledón; la bulbificación se inició entre los 35 y 49
días, y a los 91 días ocurrió la senescencia. Los rangos
promedios fueron 0,7-1,8 mg semilla-1 para el peso de las semillas,
4,9-7,0 cm hoja-1 para LH, 78,6-125 |
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ISSN: | 0365-2807 |