Inheritance of late flowering in natural variants of soybean cultivars under short-day conditions

Pesquisa Agropecuária Brasileira

Valeria Carpentieri-pipolo¹  Leones Alves De Almeida¹  Romeu Afonso De Souza Kiihl¹  Eduardo Stefani Pagliosa¹ 

关键词: Glycine max;    breeding program;    long juvenile period;    low-latitude regions;    natural mutation;    photoperiod.;    Glycine max;    programa de melhoramento;    período juvenil longo;    regiões de baixa latitude;    mutação natural;    fotoperíodo.;   

DOI  :  10.1590/S0100-204X2014001000006

来源: SciELO

【 摘 要 】

The objective of this work was to determine the inheritance of the long juvenile period trait in natural variants of the Doko, BR 9 (Savana), Davis, Embrapa 1 (IAS 5RC), and BR 16 soybean cultivars. Complete diallel crosses were made between the Doko and BR 16 cultivars and their variants. A 3:1 segregation ratio was observed in the F2 populations of the 'Doko' x Doko-18T, 'Doko' x Doko-Milionária, 'Davis' x São Carlos, and 'BR 9 (Savana)' x MABR92-836 (Savanão) crosses, indicating that the long juvenile period trait is controlled by a pair of recessive genes. The difference in late flowering between the Doko cultivar and both of its variants was caused by a recessive spontaneous mutation at the same genetic locus. However, the variants Doko-18T and Doko-Milionária are identical mutants that share a pair of genes that control the long juvenile period under short-day conditions. These mutants can be used in breeding programs to develop cultivars adapted to low-latitude tropical regions.

【 授权许可】

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