Combining ability analysis in bitter gourd para melhoria potencial da qualidade

• Published in: Brazilian journal of biology 2024-01, Vol.84
• Main Authors: Kundu, B.C, Mohsin, G.M, Rahman, M.S, Ahamed, F, Mahato, A.K, Hossain, K.M. Delowar, Jalloh, M.B, Alam, Md. Amirul
• Format: Article
• Language: English
• ISSN: 1519-6984
• DOI: 10.1590/1519-6984.255605

Combining ability analysis provides useful information for the selection of parents, also information regarding the nature and magnitude of involved gene actions. Crops improvement involves strategies for enhancing yield potentiality and quality components. Targeting the improvement of respective characters in bitter gourd, combining ability and genetic parameters for 19 characters were estimated from a 6*6 full diallel analysis technique. The results revealed that the variances due to general combining ability (GCA) and specific combining ability (SCA) were highly significant for most of the important characters. It indicated the importance of both additive and non-additive gene actions. GCA variances were higher in magnitude than SCA variances for all the characters studied indicating the predominance of the additive gene effects in their inheritance. The parent [P.sub.2] (BG 009) appeared as the best general combiner for earliness; [P.sub.1] (BG 006) for number of fruits, average single fruit weight and fruit yield; [P.sub.4] (BG 027) for node number of first female flower and days to seed fruit maturity; [P.sub.3] (BG 011) for fruit length and thickness of the fruit flesh; [P.sub.5] (BG 033) for 100-seed weight; and [P.sub.6] for number of nodes per main vine. The SCA effect as well as reciprocal effect was also significant for most of the important characters in different crosses. Keywords: bitter gourd (Momordica charanta L.), genetic parameters, diallel, GCA, SCA. A analise da capacidade de combinacao fornece informacoes uteis para a selecao dos pais, tambem informacoes sobre a natureza e a magnitude das acoes dos genes envolvidos. A melhoria das safras envolve estrategias para aumentar a potencialidade da producao e os componentes de qualidade. Visando ao aprimoramento dos respectivos caracteres em cabaca-amarga, capacidade de combinacao e parametros geneticos para 19 caracteres, foram estimados a partir de uma tecnica de analise dialelica completa 6 * 6. Os resultados revelaram que as variancias, devido a capacidade geral de combinacao (GCA) e capacidade especifica de combinacao (SCA), foram altamente significativas para a maioria dos caracteres importantes. Indicou a importancia das acoes genicas aditivas e nao aditivas. As variancias GCA foram maiores em magnitude do que as variancias SCA para todos os caracteres estudados, indicando a predominancia dos efeitos do gene aditivo em sua heranga. O pai [P.sub.2] (BG 009) apareceu como o melhor combi