GENETIC VARIATION IN TWO PINE SEED NATURAL STANDS ESTABLISHED IN MICHOACÁN STATE

Authors

  • Patricia Delgado Valerio Facultad de Agrobiología “Presidente Juárez”, Universidad Michoacana de San Nicolás de Hidalgo
  • Joaquín Núñez Medrano Facultad de Agrobiología “Presidente Juárez”, Universidad Michoacana de San Nicolás de Hidalgo
  • Ma. Carmen Rocha Granados Facultad de Agrobiología “Presidente Juárez”, Universidad Michoacana de San Nicolás de Hidalgo
  • H. Jesús Muñoz Flores Campo Experimental Uruapan. Centro de Investigación Regional Pacífico Sur. INIFAP

DOI:

https://doi.org/10.29298/rmcf.v4i18.393

Keywords:

Seed stand, inbreeding, heterozygosity, nuclear microsatellites, Pinus, genetic variation

Abstract

More than 200 seed natural stands have been established in Mexico. However, nowadays many of them are abandoned or do not have a proper management. Genetic knowledge at the molecular level of seed trees is essential for the production of better plant quality, to ensure success in reforestation and conservation of genetic resources. The central objective of this study was to assess the levels of genetic variation in two seed stands of Pinus montezumae and Pinus pseudostrobus established in the state of Michoacán, screened with five nuclear microsatelite molecular markers. Results show that P. pseudostrobus contains a greater number of aleles (A= 19) than P. montezumae (A= 18). In P. pseudostrobus, the average observed heterozygosity was higher than the expected heterozygosity (HO= 0.290, HE= 0.277), whereas in P. montezumae the expected heterozygosity was higher (HO = 0.246, HE= 0.274). However, none of the values deviate significantly from the Hardy-Weinberg equilibrium. The effective size of P. pseudostrobus was higher (Ne= 805) than that of P. montezumae (Ne= 492), with a non-significant inbreeding level (F= -0031 in P. pseudostrobus; F= 0.103 in P. montezumae). Therefore, it can be considered that there is no significant effect of consanguinity between the trees of each seed stand and those containing individuals with the gene pool representative of the two species. Finally, a proposal to obtain seeds of particular trees to each species is presented here.

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Vol.4, Núm. 18

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Published

2018-07-06

How to Cite

Delgado Valerio, Patricia, Núñez Medrano Joaquín, Ma. Carmen Rocha Granados, and Muñoz Flores H. Jesús. 2018. “GENETIC VARIATION IN TWO PINE SEED NATURAL STANDS ESTABLISHED IN MICHOACÁN STATE”. Revista Mexicana De Ciencias Forestales 4 (18). México, ME:104-15. https://doi.org/10.29298/rmcf.v4i18.393.

Issue

Vol. 4 No. 18 (2013)

Section

Scientific article

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