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Biochemical traits useful for the determination of genetic variation in a natural population of Myracrodruon urundeuva

Author(s): Abdala Ludmila | Moraes Mario Luiz Teixeira de | Rechia Carem Gledes Vargas | Giorgini Jarbas Francisco | Sá Marco Eustáquio de | Polizeli Maria de Lourdes Teixeira de Moraes

Journal: Pesquisa Agropecuária Brasileira
ISSN 0100-204X

Volume: 37;
Issue: 7;
Start page: 909;
Date: 2002;
Original page

Keywords: Myracrodruon urundeuva | seed | proteins | lipids | carbohydrates | evaluation

The objectives of this work were to analyze seeds from 20 trees of aroeira (Myracrodruon urundeuva Fr. All.) of a natural population located in the region of Selvíria, State of Mato Grosso do Sul, Brazil, in order to evaluate their protein, lipid and carbohydrate contents, and to estimate their genetic variation. A completely randomized experimental design consisting of 20 treatments (families) was set up, with two replications. Four types of proteins were detected: albumin (35.0 to 107.3 mg/g seed), globulin (3.4 to 9.3 mg/g), prolamin (60.0 to 135.2 mg/g) and glutelin (118.0 to 286.0 mg/g). The lipid content varied between 200 and 334 mg/g seed. The total sugars also varied (26.5 to 46.3 mg/g seed), with a predominance of polyols (arabinitol, mannitol, glucitol and xylitol). The main monosaccharides detected were glucose and arabinose. Total hydrolysis of the sugars indicated the presence of neutral arabinan and xylan oligosaccharides. The starch content varied from 0.35 to 1.58 mg/g seed. These biochemical traits showed considerable genetic variability, indicating that only the collection of seeds from many different trees can provide a representative sample of the population for conservation and genetic improvement.
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