Abstract
Arachis pintoi accessions were morphologically characterized using a list of descriptors prepared by IBPGR/ICRISAT. Data from stems, leaves, flowers, pegs, pods, and seeds were collected. Phenotypic correlations were calculated among descriptors, and diversity indices were computed to access the genetic diversity among accessions. Principal component analysis was executed, and a cluster analysis was performed to group the germplasm. The germplasm presented great morphological variability with most of the descriptors showing polymorphism. From 595 correlations computed, 96 were statistically significant. Biologically meaningful correlations (r ≥ 0.71) were found between leaf length and pod weight; leaf length and pod width; leaf length and seed weight; leaf length and seed width; and leaf length and seed length. Diversity values were variable among traits, but in general all morphological features expressed high genetic diversity. Total genetic diversity was estimated as 0.71. Principal component and cluster analysis was able to differentiated four distinct groups.
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Carvalho, M.A., Quesenberry, K.H. Morphological characterization of the USA Arachis pintoi Krap. and Greg. collection. Plant Syst Evol 277, 1–11 (2009). https://doi.org/10.1007/s00606-008-0089-9
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DOI: https://doi.org/10.1007/s00606-008-0089-9