MORPHOLOGICAL TRAITS AS TOOL TO VERIFY GENETIC VARIABILITY OF INTERSPECIFIC DRAGON FRUIT HYBRIDS

• Main Authors: ADRIANA DE CASTRO CORREIA DA SILVA, RAFAEL ROVERI SABIÃO, FERNANDO MARCELO CHIAMOLERA, DANIELA MOTA SEGANTINI, ANTONIO BALDO GERALDO MARTINS
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Fruticultura
• Series: Revista Brasileira de Fruticultura
• Subjects: análise multivariada; pitaya-vermelha; diversidade genética; variabilidade genética
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000100802&lng=en&tlng=en

ABSTRACT With recent cultivation in Brazil, the dragon fruit still have lacks related to the selection of promising materials and there are not yet commercial varieties in the country. Therefore, manual pollination cross were held in 2010, between plants of H. undatus x H. polyrhizus and H. undatus x H. setaceus. Aiming evaluate the genetic diversity of the progenies for future use in breeding program, based on cladodes characteristics, six characters were assessed: length and diameter of stem, distance between areoles, arch height, number and size of spines/areole. From the Euclidean distance matrix analysis was constructed a dendrogram by the UPGMA method. There was great variability among hybrids, and eight of them have shown promise for use in breeding program.