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| Author(s): |
Ana Cláudia de Lima Silva
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Botucatu. 2018-03-16. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agronômicas. Botucatu |
| Defense date: | 2017-05-31 |
| Advisor: | Rogério Peres Soratto; Jaison Pereira Oliveira |
| Abstract | |
The climate is factor indispensable for agriculture. Due to climate change extreme situations water and air temperature related which are very important for the agricultural production. The production of food, including the beans, will be threatened if there isn’t development of new varieties of beans, with more tolerance or resistance to drought and high temperature adapted to the Brazilian biome. Bank of phenotypic data, generated in the area of genetic resources help in the selection of parents with desirable characteristics, which have allelic variability and produce promising segregating populations. In the collection of comum bean germplasm of active bank of germaplasm of Embrapa Rice and Beans there are 745 accessions of bean of the mulatinho commercial group. This group it’s important, both by cultivation and by the possibility of selecting interesting characteristics ate climatic extremes. This is due to the cultivation environment that occurs where soils of low fertility and dry and hot climate predominate, such as the north of Minas Gerais and the Northeast region of the country. An initial screening was performed, in which 240 accessions were selected that were more pertinent to the characteristics sought for cultivars with this type of grain. These accesses were subjected to more detailed test in relation to each characteristic. Of the 240 accessions tested and analyzed, we selected the 100 accesses that ensured the conservation of distinct alleles present in the group. This conclusion in general and based on a theoretical model that adopts, based on the studied variables, assumption about some parameters used in the calculation of the similarities of accesses. These 100 accessions were selected and composed experiment in Porangatu – Goias for morphoagronomic characterization in environments considered normal. From the results of experiments with the 100 accessions it was possible to define the 30 accesses that composed the thematic collection for high temperatures. It was observed that the averages reached grain yield per access were, respectively, 2068.88 and 1227.19 Kg ha-1, for the environments of Santo Antonio of Goias and Porangatu both in Goias, that this value changes when the selection is made for the thematic formation, and the value goes from 2400.83 and 1271.4, respectively. With the 30 accesses, the phenotypic root characterization of the thematic collection. The analysis of the data allowed to identify superior genotypes in relation to the evaluated characters, but there were no significant correlation and of high magnitude among the evaluated characters. The data were evaluated together with the productivity of the accesses of the thematic collection evaluated for high temperature in Porangatu in Goias and differences were verified in relation to the production and root system. (AU) | |
| FAPESP's process: | 14/01695-5 - Characterization of tolerance to high temperatures and water stress on access bean mulatinho |
| Grantee: | Ana Claudia de Lima Silva |
| Support Opportunities: | Scholarships in Brazil - Doctorate |