Genetic diversity of farmer-preferred cowpea (Vigna unguiculata L. Walp) landraces in Turkey and evaluation of their relationships based on agromorphological traits

Abstract

2017): Genetic diversity of farmerpreferred cowpea (Vigna unguiculata L. walp) landraces in Turkey and evaluation of their relationships based on agromorphological traits. Vol 49, No.3, Cowpea (Vigna unguiculata L. Walp) is one of the important vegetable, grain, and fodder legume species grown in the tropics and subtropics. Cowpea is grown on small farms, and locally adapted landraces or populations are cultivated, and genetic improvements are limited by the lack of knowledge of genetic diversity of the indigenous and cultivated germplasm. Characterization and classification of diversity of the germplasm is valuable for both plant breeders and germplasm curators in the development of conservation strategies and identification of plant genetic resources. In the present study, 36 qualitative and quantitative agromorphological traits were used to characterize and assess the genetic diversity of 32 farmer preferred cowpea genotypes collected from diverse cultivated locations. Genetic variation was highly significant, and phenotypic diversity was observed for agromorphological traits. Agromorphological traits were classified by principal components analysis (PCA) into 10 components, which explained 81.18% of the total variation. PCA revealed that seed properties such as weight, diameter, width, length, eye color and immature pod pigmentation, leaf and pod color properties were the primary characteristics to discriminate cowpea genotypes. The hierarchical analysis grouped the genotypes into five clusters, and significant association was not apparent between geographic origin and agromorphological traits. The promising germplasm was identified to improve the landraces for fresh pod, grain, and fodder.

Relationships between Hybrid Performance and Genetic Distance Revealed by Morphological and Molecular Markers in Cowpea (Vignaunguiculata (L.) Walp)

“…Our study certain the presence of a high phenotypic diversity among cowpea genotypes studied in the current investigation exhibiting a good start for plant development programs to release hybrid and new varieties. Our results are in line with those observed by Hedge and Mishra (2009), Stoilova and Pereira (2013), Mafakheri et al (2017), Lazaridiet al (2017, Bozokalfa et al (2017) and El-Nahrawy (2018) who reported high phenotypic diversity among cowpea genotypes. Generally, Data analysis were considered for the polymorphic and reproducible excreted by the eleven ISSR primers, and ten SRAP primer pairs.…”

Improvement in cowpea variety Videza for traits of extra earliness and higher seed yield

“…According to Singh et al. (2007) and Bozokalfa et al. (2017) , many small-scale farmers deliberately favour shortened planting dates over longer durations in order to prevent complete crop failure.…”

Yerel Börülce (Vigna unguiculata (L.) Walp.) Populasyonlarının Bakla ve Danelerinin Agronomik Özelliklerinin Belirlenmesi

“…Börülce yetiştiriciliği süresince meydana gelen ve tüketici tercihleri doğrultusunda şekillenen ve temelinde agronomik özelliklere yön veren karakterler bakımından varyabilite diğer araştırıcılar tarafından vurgulanmıştır (Benner-Lartey and Ofori, 1999;Othman et al, 2006;Cobbinah et al, 2011;Gbaguidi et al, 2015). Genotipler arasında görülen agronomik ve morfolojik özellikleri içeren fenotipik varyasyonların temelinin genetik varyasyonlar olduğu bildirilirken varyasyonların genetik açıdan farklı populasyonlardan kaynaklandığı işaret edilmektedir (Bozokalfa et al, 2017).…”