The international network for edible aroids INEA is presently leading this step but more efforts are needed within the breeding community to translate these into practical field breeding that will lead to varietal release in participating countries. Both species are generically called cocoyam in most parts of the tropics where they are grown Figure 1. Such variation indicates considerable heterozygosity in the parent cultivars. The supernatant was decanted and then the sample was reweighed. Good literacy rate of farmers and income security of producing households. A project called “BioCassava Plus” is developing a cassava with lower cyanogen glucosides and fortified with vitamin Airon and protein to help the nutrition of people in sub-Saharan Africa.
Critical production and socio- other districts. Despite local economic importance, there is limited scientific information on post-harvest properties and related commercial food applications. Cocoyam is gluten free thus suitable for individuals that are allergic to gluten. The regenerated plantlets can be free from contaminants but has potential of expressing a wide range of morphological and physiological variability. Sometimes, the corms are placed in boxes before loading into the building while others are placed directly on the storage floor.
This could be attributed to a lot of factors such as climate variation, drought, poor cultural practices among cocoyam growers, pest and diseases infestation Ezenwu, In addition, the germination and planting of seedlings and screening processes takes up to 10 years or more from the luterature you make pollination, until the new, improved cultivar finally reaches a large number of farmers [ 39 ]. Farm management for Asia: Traditional Storage Aroids are stored in a variety of traditional low-cost structures such as shade, hut and underground pits.
Global distribution of cocoyam taro and tannia production.
Submit your next manuscript to BioMed Central and we will help litterature at every step: However, resulted in a significant reduction in starch content and increase in total sugar content. Critical production and socio- other districts. A safe processing method used by the Amerindian pre-Columbian people of the Americas is to mix the cassava flour flour water revkew a thick paste and then let it stand in the shade for five hours in a thin layer spread over a basket.
In the post-Columbian period, it was introduced to Caribbean and tropical American regions [ 29 ]. Presented in Table 5 are the sensory attributes of the cookies produced.
Towards an Enhanced Breeding in Cocoyam: A Review of Past and Future Research Perspectives
Selection can become much more efficient when the desired expression of the most important plant characteristics such as yield, eating quality and disease resistance are associated with such markers [ 35 ].
Project Information Document,pp. Producers who cultivated access and intensiication of productive inputs should cocoyam on a sole crop basis earned average net income also be considered. It is recommended that planted fields be weeded regularly to ensure that crop is free from weed competition during the first three months following planting.
Cassava has continually played very vital roles, which include; income for farmers, low-cost food sources for both rural and urban dwellers as well as house-hold food security Nweke, In Nigeria, cassava is generally believed to be cultivated by small scaled farmers with low resources Ezebuiro, et al It also plays a major role in the effort to alleviate the food crisis in Africa.
Ghana J Competing interests Agric Sci.
CRRD is caused by the oomycete Phthium myriotylum. Nigeria review of cassava increased from This attests to the favourable conditions. Cocoyams show a diverse array of agro-morphological polymorphism. Plants with different levels of root rot disease tolerance have been obtained through the irradiation with gamma rays on in vitro grown docoyam [ ].
(DOC) CHAPTER TWO LITERATURE REVIEW HISTORY OF COCO YAM | korede junior –
Damage to cocoyam tissue is followed by enzymatic browning reactions from polyphenol oxidases catalyzing the oxidation of polyphenols resulting complex formation leading to the production of literatuee that cause discolorations.
In some cases, death may result within one or two hours. Cassava accounts for a daily caloric intake of 30 cocoyam in Ghana and is grown by nearly every farming family. These cultivars fall into two main groups: The polygenic nature of HR makes it difficult for population of pathogen to overcome resistance. Because taro has a high water requirement and a long growing season it can only grow where water is available most of the year. There are more than cultivars of taro, selected for their edible corms or cormels, or their tropical looking ornamental foliage.
Each sample 50 g was filled into graduated cylinder and their weight noted. Breeders are favouring resistance sources within the cultivated genepool [ ].
The wider implication of this review is accelerated breeding and crop improvement. The flour of the sweet variety has a delicate flavor and can replace potatoes. Germinating seeds can be colonised by pathogens like Curvularia spp.
It is observed largelyrespectively. Hence, the crop has remained perpetually under-researched and under-utilized. Severe cyanide poisoning, particularly during famines, is associated with outbreaks of a debilitating, irreversible literature disorder called konzo and, in some cases, death.