Abstract
The improvement of the fresh bulb and the economic dry matter yields of onion is dependent on the morphogenetic variability and the interrelationships amongst morphological attributes which can be used to determine the quality or performance of the crop. This research was aimed to study the morphogenetic characteristics of ten genotypes of onion (Ares, Violet de Galmi, Red Creole, “Wase”, “Dan Zaria”, “Dan Garko”, “Dan Giyawa”, “Bahaushe”, “Bakana” and “Yar Aleiro”) in Jos, Plateau State. Using the seedlings raised in the nursery, the genotypes were laid out in a completely randomized design (CRD) with four replicates. Results showed that morphological attributes differed amongst the genotypes, except the number of leaves per plant, neck thickness and horizontal bulb diameter. The study concludes that morphological differences, which are responsible for differences in fresh bulb and dry matter yields, exist amongst the different genotypes of onion. These attributes could be used as selection indices in the improvement of the onion.
Highlights
Onion (Allium cepa L.) belongs to the family Alliaceae
The improvement of the fresh bulb and the economic dry matter yields of onion is dependent on the morphogenetic variability and the interrelationships amongst morphological attributes which can be used to determine the quality or performance of the crop
The study concludes that morphological differences, which are responsible for differences in fresh bulb and dry matter yields, exist amongst the different genotypes of onion
Summary
Onion (Allium cepa L.) belongs to the family Alliaceae. It originated in Central Asia, but can be found all over the world today. The total world production of onions in 2013 was 4,281,501 tons, out of which 648,247 tons was produced in Africa; 267,164 tons from West Africa and 235,000 tons in Nigeria. These tonnages were obtained from 230,180 ha, 46,469 ha, 16,221 ha and 14,000 ha with average yields of 18,600.8 kg/ha, 13,950.1 kg/ha, 16,470.3 kg/ha and 16,785.7 kg/ha, from the world, Africa, West Africa and Nigeria, respectively (FAOSTAT, 2013). The productivity of onion depends on growth attributes such as leaf area, leaf area index and crop growth rate (Abou El-Magd, 2013). Morphological studies are basically used to determine the quality and performance of a crop plant
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