English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Good seed quality can be obtained through control of the entire seed production process. There are emerging issues in the seed sector due to seed quality in market. In many countries seed and planting materials available to farmers are often of insufficient quality, thus undermining the potential performance of crops. The objective this study was to use morpho-anatomical traits to determine the levels of maize hybrid seed purity on the market in Uganda. A total of 120 samples of four popular commercial maize hybrid were collected from agro-dealers in 13 districts, representing 3 seed companies’ distribution network. The samples were planted and evaluated based on their descriptors, using an Alpha Lattice Design, with two replications at the National Crops Resources Research Institute (NaCRRI), Namulonge. Data were collected for 33 morpho-anatomical traits. Results showed significant (P<0.05) differences within hybrids, and sources of seed among districts. Among the test materials, only Longe 9H had no significant (P<0.05) difference within traits but others had some levels of significant (P<0.05) differences. The principal component analysis of quantitative traits resulted in four components for each variety, with the explanation total of 53.3% for Longe 6H, 51.1% for Longe 7H, and 92.8% for Longe 9H and 39.1% for Longe 10%. There were varying levels of contamination of commercial hybrids based on morphoanatomical traits diversity within hybrids, compared to their descriptors for the traits evaluated. Hence, there is need to strengthen the quality control sub-sector for improved productivity at farmer levels. Key Words : Diversity, Longe, seed, Uganda, Zea mays Des semences de bonne qualite peuvent etre obtenues en exercant un control systematique sur chacun des maillons du systeme de production semenciere. Le secteur semencier connait de plus en plus de difficultes, et ceci en raison de la qualite des semences sur le marche. Dans plusieurs pays, les semences  disponibles pour les producteurs sont souvent de qualite non satisfaisante, reduisant ainsi la performance des cultures. L’objectif de l’etude etait de se servir des caracteres morpho-anatomiques afin de determiner le niveau purite des  semences de mais hybride sur le marche semencier en Ouganda. Au total 120 echantillons des quatre varietees commerciales populaires de mais hybride ont ete collectes chez les distributeurs de semences dans 13 districts, representant les reseaux de distribution de 3 compagnies semencieres. Les echantillons ont ete semes et evalues en se basant sur leurs descripteurs. Le dispositive experimental Alpha Lattice a ete utilise, avec deux repetitions a l’institut national de recherche des ressources culturales (NaCRRI), Namulonge. Les donnees de 33 caracteres morphoanatomiques ont ete collectees. Les resultats ont montre des differences significatives (P<0,05) ont ete observees parmi les hybrides, ainsi que les sources des semences au sein des districts. Parmi les materiels testes, seul Longe 9H n’avait exhibe aucune difference significative (P<0,05) des caracteres evalues, mais certains ont des differences  significatives a (P<0,05). l’analyse en  composntes principales des traits quantitatifs a montre quatre composantes pour chaque variete, avec l’ensemble de ces composantes expliquant 53,3% de la variation totale pour Longe 6H, 51,1% pour Longe 7H, 92,8% pour Longe 9H et 39,1% pour Longe 10%. Les niveaux de contamination etaient variables, suggerant la necessite de renforcer le sous-secteur de control de qualite en vue d’une  meilleure productivite au niveau des producteurs. Mots Cles : Diversite, Longe, semence, Ouganda, Zea mays

Application of morpho-anatomical traits of maize plant to quality control and quality assurance in maize seed system