Articles
SEED SIZE, GERMINATION AND BULB UNIFORMITY IN ONION (ALLIUM CEPA L.) CV. VALCATORCE INTA
Article number
433_65
Pages
573 – 584
Language
Spanish
Abstract
High seed quality is expressed as percentage of seeds germinated in a seed lot, called seed germination (SG), and the germination rate of the process or seed vigor (SV). These issues are directly or indirectly related to the success of crop establishment and its further productivity.
The gravimetric classification of seeds has been largely used to qualify seed lots in different vegetable crops.
Regarding to onion seeds (Allium cepa L.), it has been correlated the crop productivity and quality with seed size and the weight of 1 000 seeds.
The purpose of this research was to determine combined effects of the seed size as expressed by the diameter of the seeds at three levels (2.000, 2.375, and 2.750 mm), and the gravimetric classification of seeds obtained from a gravity seed separator (Miretti, TM) through three delivery outlets (1, 3 and 5) on seed quality and yield components in the cultivar ‘Valcatorce INTA’. The trials were repeated during two years using a factorial design in a completed randomized block design.
In both years, seed diameter had stronger effects than seed gravity on all the variables.
It was found interactions among seed size and weight when SG was analized.
Consequently, SG increased linearly as seed diameter was greater.
Plant emergence increased curvilinearly as seed diameter was greater.
Other crop variables such as plant height, commercial yield of bulbs and the percentage of bulb classes 5 and 6 also increased curvilinarly as seed diameter was greater.
In the same way, the time from emergence till harvest shorted when seed diameter increased.
In addition, the diameter of the bulb neck at harvesting was smaller as the seed diameter increased.
Polynomials for each relationship were fitted in order to estimate the biological parameters.
According to these results, it is concluded that the performance on onion crops cultivated with ‘Valcatorce INTA’ can be improved classifying the seed lots regarding the seed diameter.
The gravimetric classification of seeds has been largely used to qualify seed lots in different vegetable crops.
Regarding to onion seeds (Allium cepa L.), it has been correlated the crop productivity and quality with seed size and the weight of 1 000 seeds.
The purpose of this research was to determine combined effects of the seed size as expressed by the diameter of the seeds at three levels (2.000, 2.375, and 2.750 mm), and the gravimetric classification of seeds obtained from a gravity seed separator (Miretti, TM) through three delivery outlets (1, 3 and 5) on seed quality and yield components in the cultivar ‘Valcatorce INTA’. The trials were repeated during two years using a factorial design in a completed randomized block design.
In both years, seed diameter had stronger effects than seed gravity on all the variables.
It was found interactions among seed size and weight when SG was analized.
Consequently, SG increased linearly as seed diameter was greater.
Plant emergence increased curvilinearly as seed diameter was greater.
Other crop variables such as plant height, commercial yield of bulbs and the percentage of bulb classes 5 and 6 also increased curvilinarly as seed diameter was greater.
In the same way, the time from emergence till harvest shorted when seed diameter increased.
In addition, the diameter of the bulb neck at harvesting was smaller as the seed diameter increased.
Polynomials for each relationship were fitted in order to estimate the biological parameters.
According to these results, it is concluded that the performance on onion crops cultivated with ‘Valcatorce INTA’ can be improved classifying the seed lots regarding the seed diameter.
Publication
Authors
E.L. Gabriel, M.A. Makuch, R.J. Piccolo
Keywords
Allium cepa L., onion seed, classification, seed size, germination, yield, bulb quality
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