Vol. 12, Issue 10 (2023)

Author(s):
CK Airina and S Sarada

Abstract:
To assess the heterosis over mid, better, and standard parents, fifteen F₁ hybrids from a cross between three mosaic-resistant cowpea accessions as testers and five high yielding yard long bean varieties as lines alongside their parents and a standard check were tested for 19 yield characters. Field scoring for the black eye cowpea mosaic virus (BlCMV) was performed to determine mosaic resistance. All the parameters under study showed significant desirable heterosis, except for pod length and girth. The crosses KAU Deepika x Manjari and KAU Mithra x Manjari registered significant positive heterosis over mid, better, and standard parents for pod yield and high mid-parent heterosis and standard heterosis for pods per plant. The highest magnitude of standard heterosis was identified for pods per plant (101.14%), followed by yield per plant (75.30%). Besides the heterotic potential, the hybrid KAU Mithra x Manjari, KAU Deepika x Manjari and Githika x Manjari were resistant to mosaic disease.