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Data are given on seed characteristics and nutritive value for 6 accessions of 4 wild Vigna taxa (V. vexillata, V. oblongifolia, V. gracilis and V. unguiculata subsp. dekindtiana) and 27 cultivated V. unguiculata varieties. The 100-seed weight ranged from 2 to 6 g among wild and from 6 to 24 g in...


Marconi, E.Lomardi-Boccia, G.Carnovale, E.Ng, N.Q.[Nutritional evaluation of wild and cultivated species of cowpea]Nutritional evaluation of wild and cultivated species of cowpea

Interspecific hybridization between Vigna unguiculata and V. vexillata always failed: no seed was obtained in both crossing directions. Two different barriers to crossability were found: a pre-zygotic barrier and a post-zygotic one. Many abnormalities were observed in pollen-tube development, whi...


Barone, A.Giudice, A. delNg, N.Q.[Barriers to interspecific hybridization between Vigna unguiculata and Vigna vexillata]Barriers to interspecific hybridization between Vigna unguiculata and Vigna vexillata

Early embryogenesis up to 8 days after pollination was characterized in V. unguiculata. When crosses were performed between V. unguiculata and wild V. vexillata, seeds were not obtained due to crossability barriers. In most cases pollen tube growth was arrested in the stigmatic tissue. In the 15-...


Barone, A.Ng, N.Q.[Embryological study of crosses between Vigna unguiculata and V. vexillata]Embryological study of crosses between Vigna unguiculata and V. vexillata

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