Resumen

WILLIAMS-ALANIS, H. et al. Line X tester analysis to estimate combining ability in sweet sorghum. Revista bio ciencias [online]. 2023, vol.10, e1518.  Epub 12-Abr-2024. ISSN 2007-3380.  https://doi.org/10.15741/revbio.10.e1518.

Sweet sorghum is important for bioethanol production, which constitutes a renewable energy source, capable of substituting fossil fuels. This study aimed to estimate general (GCA) and specific combining ability (SCA), in parents and hybrids of sweet sorghums, to identify the best genotypes for bioethanol production. The experiment consisted of five lines, six testers, and the 30 possible hybrids, planted under rainfed conditions, during the spring-summer 2017 cycle; at Las Huastecas Experimental Station (INIFAP) in a randomized complete block experimental design with three replicates. Combining ability was estimated using the Line X Tester Analysis. Obtained results showed that lines; Potranca and K.CollierA, and testers; 3-2-1 and 4-1-1 had highly significant values (p ≤ 0.01) of GCA for °Brix, total plant weight, stem weight, juice weight, and bioethanol production. This indicates the predominance of additive genes. For bioethanol production, the best hybrids were: Potranca*2-1-2, K.CollierA*3-2-1, K.CollierA*4-1-1, and Potranca*4-1-1, which are highly significant (p ≤ 0.01) in SCA for bioethanol production; also, they are the ones that presented the highest values.

Palabras llave : Hybrids, bioethanol; combining ability; parents; Sorghum bicolor.

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