科研之友
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摘要
The soybean crop has an important role as raw material for biodiesel and capability for the production of ethanol from carbohydrate present. In this sense, the present study was to evaluate the genetic divergence and phosphorus use efficiency, with respect to carbohydrate content, aimed at producing etanol. For both the agricultural year 2009/10 were conducted field trials of four soybean cultivars, two in the University Campus Palmas and two others at the University Campus of Gurupi. At each site, cultivars were conducted under high and low phosphorus (150 kg ha(-1) P2O5 and 30 kg ha(-1) P2O5 respectively), resulting in four environments. The experimental design used in each trial was randomized blocks with three replications and 11 treatments. We studied the characteristic percentage of carbohydrates and determined the efficiency of phosphorus use by cultivars, using the methodology adapted from Fischer, and the environmental stratification. The genetic diversity was performed by multivariate procedures: Mahalanobis distance, grouping method of Tocher and closer neighbor. In the study of genetic diversity, each test representing a distinct variable in the multivariate model. The cultivars show different behaviors depending on the dose of phosphorus. The environments were dissimilar regarding the rank order of cultivars. M8766RR, M8867RR and M9144RR are potentially promising for carbohydrate production and efficient use of phosphorus. Hybridizations M8766RR x M9144RR and M8867RR x M9144RR may be used for obtaining segregant populations in order to characteristic carbohydrate content.
- 出版日期2014-10
