Variability of three regional sources of germplasm of Tejocote (<Emphasis Type="Italic">Crataegus</Emphasis> spp.) from central and southern Mexico |
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| Authors: | Carlos A Núñez-Colín Raúl Nieto-Ángel Alejandro F Barrientos-Priego Jaime Sahagún-Castellanos Sergio Segura Fernando González-Andrés |
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| Institution: | (1) Instituto de Horticultura, Departamento de Fitotecnia, Universidad Autónoma Chapingo, Km. 38.5 Carretera Mexico-Texcoco, Chapingo, Estado de Mexico, 56230, Mexico;(2) Centro Regional Universitario Centro Occidente, Universidad Autónoma Chapingo, Morelia, Michoacan, 58000, Mexico;(3) Departamento de Ingeniería Agraria, E. S. T. Ingeniería Agraria, Universidad de León, Leon, Castilla y Leon, 24071, Spain |
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| Abstract: | Tejocote (Crataegus spp.) is a genus of fruit-bearing trees distributed widely throughout Mexico; 13 species are reported for the north and central
zones and two or more species may be present in southern Mexico. Accessions of this genus are safeguarded in the Germplasm
Bank of Tejocote at the Autonomous University of Chapingo, mainly from three regional sources, i.e. the states of Puebla,
Mexico, and Chiapas, including five different species that belong to series Mexicanae and series Crus-galli. They can be morphologically
characterized by leaves from different shoot types, flowers and fruits. Multivariate statistical methods were used to elucidate
patterns of variation in each of these regional sources. The sources displayed very low intra-source variability. The source
from Chiapas showed significant statistical differences in all morphological variables evaluated, as a result, this genetic
pool is considered as different from the other two sources. The sources from the states of Puebla and Mexico only differed
by 22.79% (with P ≤ 0.05), and thus they could be considered as components of a single genetic pool. The most highly discriminant variables
were from the leaf, such as basal angle, petiole length/major axis length ratio, minor axis length/major axis length ratio,
and number of veins.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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| Keywords: | Central and southern Mexico Genetic resources Germplasm Bank Mexican hawthorns Morphological variability Rosaceae subfamily Maloideae |
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