Estimation of genetic parameters for flower anomalies in papaya

Floral abnormalities in papaya cause fruit deformation and yield reduction in some periods of the year. This study aimed to evaluate 23 inbreed lines and 22 hybrids in crosses between the lines Solo and Formosa in relation to floral abnormalities, and to develop a methodology to estimate summer sterility by counting of nodes without fruits. The traits evaluated were: number of carpelloid and pentandric fruits (in March and July 2007); number of nodes without fruit and neck length (in December 2006 and April 2007); and sum of abnormalities. Hybrids presented means higher than those of the lines for all abnormalities. The capelloidy was seasonal only for lines, and the pentandry showed the lowest coefficients of determination for lines and hybrids. The number of nodes without fruit was adequate to infersummer sterility. This anomaly was the most important in the lines and hybrids.

[1]  J. Dantas,et al.  AVALIAÇÃO AGRONÔMICA DE LINHAGENS E HÍBRIDOS DE MAMOEIRO , 2015 .

[2]  Messias Gonzaga Pereira,et al.  NOVOS HÍBRIDOS DE MAMOEIRO AVALIADOS NAS CONDIÇÕES DE CULTIVO TRADICIONAL E NO SEMIÁRIDO BRASILEIRO , 2015 .

[3]  M. A. D. S. Vasconcellos,et al.  Expressão da esterilidade feminina e da carpeloidia em mamoeiro sob diferentes ambientes de cultivo protegido , 2011 .

[4]  M. G. Pereira,et al.  Seasonal and genetic influences on sex expression in a backcrossed segregating papaya population , 2011 .

[5]  C. Trehin,et al.  Carpeloidy in flower evolution and diversification: a comparative study in Carica papaya and Arabidopsis thaliana. , 2011, Annals of botany.

[6]  M. G. Pereira,et al.  Meiotic behavior of Carica papaya and Vasconcellea monoica , 2010 .

[7]  M. G. Pereira,et al.  Preferential reproduction mode of hermaphrodite papaya plant (Carica papaya L; Caricaceae) , 2009 .

[8]  M. G. Pereira,et al.  Karyotype determination in three Caricaceae species emphasizing the cultivated form (C. papaya L.) , 2009 .

[9]  Francisco Ferreira da Silva,et al.  Comportamento floral de híbridos de mamoeiro (Carica papaya L.) avaliados no verão e na primavera , 2008 .

[10]  C. Cesar.  Intraspecific chromosomic divergence in Batrachyla antartandica (Ceratophryidae) from southern Chile: further evidences of cytogenetics diversity in frogs , 2008 .

[11]  M. G. Pereira,et al.  Evaluation of the sexual expression in a segreganting BC1 papaya population , 2007 .

[12]  O. K. Yamanishi,et al.  BEHAVIOR OF SEKATI PAPAYA UNDER CONDITIONS OF THE WESTERN BAHIA , 2006 .

[13]  Cláudia Sales Marinho,et al.  Expressão sexual do mamoeiro sob diferentes lâminas de irrigação na Região Norte Fluminense , 2003 .

[14]  T. Arkle,et al.  Floral differentiation in the hermaphroditic Papaya , 1984 .

[15]  F. G. Holdaway,et al.  Papaya Production in the Hawaiian Islands , 1941 .