Assessment of Cowpea (Vigna unguiculata (L.) Walp.) Mutant Lines for Drought Tolerance

Autor:	Mahamadou Sawadogo, Teyoure Benoit Joseph Batieno, Jean Baptiste Tignegre, Zakaria Dieni, Nerbéwendé Sawadogo, Karidiatou Gnankambary, Tinga Jeremy Ouedraogo
Rok vydání:	2020
Předmět:	0106 biological sciences Chlorophyll content Article Subject biology Agriculture (General) Mutant line Drought tolerance Water stress Mutant food and beverages Sowing 04 agricultural and veterinary sciences biology.organism_classification 01 natural sciences S1-972 Vigna Point of delivery Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Agronomy and Crop Science 010606 plant biology & botany
Zdroj:	International Journal of Agronomy, Vol 2020 (2020)
ISSN:	1687-8167 1687-8159
DOI:	10.1155/2020/8823498
Popis:	Cowpea provides the cheapest source of protein with an average range of protein content of 23–30%. However, cowpea growth, development, and yield are greatly affected by drought during flowering and pod filling in the sub-Sahelian areas. The best way to cope with this situation is to develop drought-tolerant cowpea varieties. The objective of this study was therefore to evaluate cowpea lines developed through mutagenesis using gamma radiation to assess their reaction under optimal and water-stressed conditions. The response of ten mutants-irradiated Moussa local was then evaluated in pots arranged in a split plot design in a screen house. Two conditions were applied with optimum and water-stressed conditions. The stress was applied for two weeks at flowering. Two cowpea varieties Gorom local (drought-tolerant) and Moussa local (susceptible) nonirradiated were used as checks. Thereafter, field trials under two different sowing dates were conducted to identify the best tolerant mutant line(s) using agromorphological and tolerance indicators. The results indicated that mutant lines (MoussaM51-4P10 and MoussaM43-20P14) exhibited better stress tolerance and produced higher yield under water stress conditions. Stress Tolerance Index (STI) was better to select cowpea mutant tolerant with higher yielding under moderate stress (SI = 35%). The study confirmed that water stress has a negative effect on cowpea seeds production and on leaf chlorophyll content. The high temperature during experiment increased water stress effect mainly on non-irradiated checks (Gorom local and Moussa local).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ddbab0f3647ae6993a3b7a2a01717624 https://doi.org/10.1155/2020/8823498 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.