Diversidade genética em acessos de Luffa cylindrica baseado em análise molecular e caracteres morfo-agronômicos

Abstract

The culture of the loofah has been outstanding in the market of natural fibers for easy manipulation and applicability in various sectors of agribusiness. The study of the molecular diversity varietal level, morphological and productive within a germplasm collection are essential for the establishment of a selection and playback program that allows screening of materials with desirable characteristics for different applications. In this sense the objective of this work was to study the genetic divergence loofah access from binary data, multicategorios and quantitative, in addition to parallel correlation analysis, estimates of genetic parameters and regression analysis on performance for six months. 24 loofah access, are in the BAG-UFAM and come from the states of Amazonas, Rondônia, Pará, Federal District, São Paulo, Paraná and Santa Catarina assembled and assigned institutionally through germplasm assignment of the Federal University of Amazonas, Embrapa vegetables, Institute Agronomic of Paraná, and the Campinas Agronomic Institute. The results of the diversity at the molecular level and morphological and agronomic demonstrates that there different groups of settings both with wide variability potêncial to be explored between accesses. Regarding the qualitative and quantitative data results showed that the materials are phenotypically different for 30 descriptors analyzed with different botanical and biometric conformations of which the variable; fruit length (62.32%) was the component that contributed most to divergence found. There is a positive correlation between the variables; fruit length x fiber mass thickness x of the fibrous web. The fruit number was the parameter showed the lowest heritability (71.9%) among the analyzed carcteristicas. Regarding the productive performance, the most hits have aptitude for planting in the area may accumulate in period of six months up to 87 fruits per plant. Regression analysis on productive behavior for six months for the fruit number, the mass of fiber and the length of fruits, reveal better understanding from the fourth order in the polynomial equation, and between one harvest and another there is more seasonal or less marked.