Resumo

ESCOBAR-SAUCEDO, Mayra Alejandra et al. Genetic and bromatological analyses of apple mutants (Malus x domestica Borkh) from golden delicious cultivar. Ecosistemas y recur. agropecuarios [online]. 2015, vol.2, n.6, pp.269-276. ISSN 2007-901X.

The apple tree (Malus x domestica Borkh) is an important fruit tree in southern Coahuila, Mexico. For flowering, it requires an accumulated number of cold air units (CAUs) which the CAUs of the region do not achieve to reach, leading to a low production. Mutations have been detected in the region that require less CAUs. The objective of this work was to determine the genetic and bromatological differences of the southern Coahuila mutants. The bromatological analysis showed that the mutant Vigas I has a lower fiber content (4.91 g) and the highest sugar content (10.73 g), which provide it with marketing advantages. The analysis of amplified length fragment polymorphisms (AFLPs), showed a larger banding pattern with the combination [EcoRI (+ACC +AGG) / Msel (+CTA)]. This combination yielded 123 amplified, 100 % polymorphic bands. The mutant closer to the control was Vigas II, with a genetic distance of 0.16 units, while the mutant with the greatest difference was Primicia. The studied mutants might be an alternative to the CAU issue in some apple tree regions of the country.

Palavras-chave : Brotador; Primicia; Cold air units; verde; vigas I-IV.

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