Diallel analysis of cowpea (Vigna unguiculata (L.) Walp.) for some physical properties of seed under the Sudano-guinean conditions

Abstract

The present study was undertaken at Dang (soudano-guinean zone of Cameroon) to determine the variability of 100-seed weight, geometric surface, porosity and sphericity of the seeds of 10 cowpea (Vigna unguiculata) genotypes and investigate the genetic basis of these characters through a 5x5 half-diallel cross mating. Knowledge of the physical properties of the seed of cowpea was necessary for the design of equipment for transporting, sorting, cleaning, separating, smashing and processing it into different foods. The experimental design was a randomized complete block with three replicates. Analysis of results showed that these genotypes presented a significant variability for the four physical properties. The average properties of seed were found to be a hundred seed mass of 20.46g, a surface area of 0.84 cm 2 , a sphericity of 35.50% and a porosity of 0.65. Genetic analysis demonstrated that the parents differed for their general combining ability (GCA) and the crosses showed specific combining ability (SCA). These physical parameters were highly heritable with broad-sense heritability (h 2 ) values ranged from 0.76 to 0.96 suggesting that genetic advance was expected. Both dominant and additive gene effects were significant for all traits with a predominance of additive genes for seed mass and dominant genes for degree of sphericity. The alleles for seed weight, degree of porosity and sphericity were mostly recessive whereas the higher performances for seed surface where due to the presence of dominant alleles. Heterosis in F 1 over best parent was recorded for some combinations. For these traits, recurrent selection might be a useful breeding strategy.

Genetic Component and Vr-Wr Graphical Analysis in Blackgram [Vigna mungo (L.) Hepper]

“…The role of both additive and non-additive gene action in the inheritance of yield and its components traits have also been reported by many other workers in blackgram (Singh and Singh, 2005;Karthikeyan, et al 2007;Bhagirath, et al 2009;Chakraborty, et al 2010;Panigrahi, et al 2015;Vadivel, et al 2019), greengram (Singh, et al 2007;Patil, et al 2011;Thangavel and Thirugnanakumar, 2011;Singh et al, 2016) and cowpea (Egbadzor et al, 2013;Dias et al, 2016). The substantial presence of non-allelic interactions has also been reported by Gupta (2005), Khan et al (2004), Chand (2000, Adeyanju et al (2012), Ramakant and Srivastava (2012) and Bindra et al (2017) in backgram; Thangavel and Thirugnanakumar (2011) and Singh et al (2016) in mungbean; and Tchiagam et al (2011) in cowpea. However, contrary to our findings absence of epistasis has also been reported by Rehman et al (2009) in mungbean for seed yield.…”

Dual‐purpose crops for grain and fodder to improve nutrition security in semi‐arid sub‐Saharan Africa: A review

“…Cowpea is planted on loamy, sandy, sandy-clay soils, and yields vary based on soil texture. On sandy clay soil in Cameroon, Tchiagam et al (2010) reported 892 kg ha −1 and 1369 kg ha −1 as grain and fodder yields, respectively. Similarly, on loamy soil, Ewansiha et al (2017) found average grain and fodder yields of 1260 kg ha −1 and 2446 kg ha −1 , respectively in Nigeria.…”

Pendugaan Parameter Genetik Vigor untuk Viabilitas dan Vigor Benih Cabai (Capsicum annuum L.) Menggunakan Analisis Setengah Dialel

“…Hal ini juga didukung oleh penelitian pada benih padi yang dilakukan oleh Akram et al (2007) dan benih cowpea (Vigna unguiculata (L.) Walp.) yang dilakukan oleh Tchiagam et al (2011).…”