A morphometric analysis of a putative hybrid between Agave marmorata Roezl and Agave kerchovei Lem.: Agave peacockii Croucher
A morphometric analysis of a putative hybrid between Agave marmorata Roezl and Agave kerchovei Lem.: Agave peacockii Croucher
- Botanical Journal of the Linnean Society, 122(2), p.155-161, 1996 .
A supposed hybrid population (Agave peacockii)between Agave marmorata and Agave kerchovei in a semiarid ecosystem at Zapotitlan Salinas, in the Mexican State of Pueba, was investigated, and its hybrid status corroborated in morphometric terms. A Stepwise Discriminant Analysis of the ratios: Number of leaves/Rosette diameter, Leaf width/Leaf length, Number of spines/Leaf length, Distance between the upper spine and the tip of the leaf/Leaf length, and Distance between the upper spine and the tip of the leaf/Number of spines, supported our hypothesis of the existence of these naturally occurring hybrids, which are intermediate and distinct from the parental species. A null model was constructed to contrast the real case with a possible artifact, and the results also supported our hypothesis. The possible meaning of this kind of hybridization is discussed.
MEXICO
MORPHOLOGICAL RATIOS
NULL MODEL
SEMIARID ECOSYSTEM
STEPWISE DISCRIMINANT ANALYSIS
A supposed hybrid population (Agave peacockii)between Agave marmorata and Agave kerchovei in a semiarid ecosystem at Zapotitlan Salinas, in the Mexican State of Pueba, was investigated, and its hybrid status corroborated in morphometric terms. A Stepwise Discriminant Analysis of the ratios: Number of leaves/Rosette diameter, Leaf width/Leaf length, Number of spines/Leaf length, Distance between the upper spine and the tip of the leaf/Leaf length, and Distance between the upper spine and the tip of the leaf/Number of spines, supported our hypothesis of the existence of these naturally occurring hybrids, which are intermediate and distinct from the parental species. A null model was constructed to contrast the real case with a possible artifact, and the results also supported our hypothesis. The possible meaning of this kind of hybridization is discussed.
MEXICO
MORPHOLOGICAL RATIOS
NULL MODEL
SEMIARID ECOSYSTEM
STEPWISE DISCRIMINANT ANALYSIS