Relationship between moisture tolerance versus yield and yield components in Cowpea
Keywords: Cowpea germplasm, moisture tolerance, relationship, grain yield.
AbstractThe experiment was carried out to exploit the broad spectra of genetic variability in cowpea germplasm for improvement of
high moisture tolerance. Twenty-five germplasm lines of diverse genteic background with three local cultivars were involved
in the evaluation over two cropping seasons (early and late) under rainfall conditions across two locations in 2006. The experiments were conducted in the Teaching and Research Farm, Ambrose Alli University, Ekpoma (Lat. 6o 08′ E and Long. 6o 42′ N) in a rain forest–savanna transition area with mean annual rainfall of 1200mm to 1556mm; and at Benin–Owena River Basin Development Authority, Obayantor, near Benin (Lat. 6o 09′ 24″and Long. 5o 35′ 27″ E) in the humid rainforest area with mean annual rainfall of 2032mm to 2540mm. RCBD with three replications was used. Significant negative relationship (r) existed between moisture tolerance and pods per plant, seeds per pod and grain yield which indicated that as severity of moisture level in the soil increased with time, susceptibility level of the germplasm also increased with a
consequent reduction in the number of pods per plant, number of seeds per pod and grain yield. Seeds per pod and 100–seed
weight were recognized as the common attributes for grain yield and selection be done based on these traits for improvement
of cowpea for high moisture stress.
It is certified that:
- The corresponding author is fully responsible for any disputes arising due to the publication of his/her manuscript.
- The article has been seen by all the authors who are satisfied with its form and content.
- The sequence of names of authors in the by-line is as per their relative contribution to this experiment, giving due credit to all scientists who made notable contribution to it.
- All the authors fully understand that inclusion of any other co-authors or exclusion of any co-authors is not possible once the article has been submitted to the journal.
- The corresponding author takes full responsibility for this article.
- The address of the organization where the research was conducted is given.
- The article is exclusive for this journal, and the results reported here have not been sent (and will not be sent during its consideration by this journal) for publication in any other journal.
- Authors agree to abide by the objective comments of referees and do agree to modify the article into a short note as per the recommendation, for publication in the Electronic Journal of Plant Breeding.
- If published in Electronic Journal of Plant Breeding, the copyright of this article would vest with the Indian Society of Plant Breeders, who will have the right to enter into any agreement with any organization in India or abroad engaged in reprography, photocopying, storage and dissemination of information contained in it, and neither we nor our legal heirs will have any claims on royalty.