Tall Pinus luzmariae trees with genes from P. herrerae

PeerJ
Christian WehenkelCarlos A López-Sánchez

Abstract

Pinus herrerae and P. luzmariae are endemic to western Mexico, where they cover an area of more than 1 million hectares. Pinus herrerae is also cultivated in field trials in South Africa and South America, because of its considerable economic importance as a source of timber and resin. Seed quality, afforestation success and desirable traits may all be influenced by the presence of hybrid trees in seed stands. We aimed to determine the degree of hybridization between P. herrerae and P. luzmariae in seed stands of each species located in the Sierra Madre Occidental, Durango, Mexico. AFLP molecular markers from samples of 171 trees across five populations were analyzed with STRUCTURE and NewHybrids software to determine the degree of introgressive hybridization. The accuracy of STRUCTURE and NewHybrids in detecting hybrids was quantified using the software Hybridlab 1.0. Morphological analysis of 131 samples from two populations of P. herrerae and two populations of P. luzmariae was also conducted by Random Forest classification. The data were compared by Principal Coordinate Analysis (PCoA) in GenAlex 6.501. Hybridization between Pinus herrerae and P. luzmariae was observed in all seed stands under study and resulted in enhancem...Continue Reading

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Methods Mentioned

BETA
PCR
PCRs
environmental stresses

Software Mentioned

Forest
GenAlex
Hybridlab
Structure
Random
Tacuache NewHybrids
True Skill Statistic
Random Forest
STRUCTURE STR
NewHybids

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