Heterozygosity, adaptability, and phenotypic stability of sweet sorghum genotypes

Gabrielle Maria Romeiro Lombardi; Daniela Oliveira Ornelas; Nayara Norrene Lacerda Durães; Rafael Augusto da Costa Parrella; José Airton Rodrigues Nunes

doi:10.1590/1983-21252024v3711517rc

Autores

Gabrielle Maria Romeiro Lombardi Department of Biology, Institute of Natural Sciences, Universidade Federal de Lavras, Lavras, MG, Brazil https://orcid.org/0000-0002-0166-1260
Daniela Oliveira Ornelas Department of Biology, Institute of Natural Sciences, Universidade Federal de Lavras, Lavras, MG, Brazil https://orcid.org/0000-0002-5217-6994
Nayara Norrene Lacerda Durães Instituto Federal do Paraná, Ivaiporã, PR, Brazil https://orcid.org/0000-0003-3112-4543
Rafael Augusto da Costa Parrella Embrapa Milho e Sorgo, Sete Lagoas, MG, Brazil https://orcid.org/0000-0001-6599-7487
José Airton Rodrigues Nunes Department of Biology, Institute of Natural Sciences, Universidade Federal de Lavras, Lavras, MG, Brazil https://orcid.org/0000-0002-6260-7890

DOI:

https://doi.org/10.1590/1983-21252024v3711517rc

Palavras-chave:

Sorghum bicolor (L.). Bioetanol. Homeostase. Ecovalência. Índice de confiabilidade.

Resumo

O sorgo sacarino (Sorghum bicolor (L.)) é uma cultura energética promissora para a produção de bioetanol. O objetivo deste trabalho foi verificar a influência da estrutura genética na adaptabilidade e estabilidade fenotípica de linhagens e híbridos de sorgo sacarino quanto aos principais caracteres agroindustriais, bem como selecionar híbridos que associem elevado rendimento de etanol e estabilidade produtiva nos ambientes de cultivo testados. Foram avaliados 45 genótipos em experimentos conduzidos no delineamento alfa-látice triplo 5 x 9 em três localidades do Estado de Minas Gerais, Brasil. Foram mensurados os caracteres produção de massa verde, porcentagem de extração de caldo, teor de sólidos solúveis totais, toneladas de brix por hectare e produção de etanol. A adaptabilidade e a estabilidade fenotípica foram aferidas pelos métodos de Wricke e Annicchiarico. Observou-se que a adaptabilidade e estabilidade fenotípica em sorgo sacarino depende da estrutura genética dos genótipos, no qual os híbridos foram mais estáveis do que as linhagens parentais. Além disso, os híbridos H2x9 e H3x8 foram os mais promissores.

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