Diversity in Apomictic Populations of Paspalum simplex Morong

• DOI: 10.2135/cropsci2013.11.0780
• Publication Date: 2014-05-29T14:00:19Z
• Authors: E.A. Brugnoli; M.H. Urbani; C.L. Quarin; A.L. Zilli; E.J. Martínez; C.A. Acuña
• Keywords: Apomixis; Polyploid; Paspalum; Germ plasm

ABSTRACT Paspalum is considered a genetic model for studying the sources of genotypic variability and breeding techniques in apomictic plants. simplex warm‐season forage grass that well represents genus since it contains different ploidy levels apomixis linked to polyploidy. The objective was evaluate diversity present within among polyploid populations P. . Germplasm collected from 17 sites covering species’ region natural distribution. at molecular level evaluated using ISSR markers. Variability agronomic traits also by cultivating all into field. analyzed were polyploid, including 13 pure tetraploid, 4 mixed tetraploid‐hexaploid with predominance tetraploid cytotype. Most (85% total variation), there not correlation between geographical distances. within‐population low most exception one them. Each genotype restricted single location. initial growth, spring fall extent vegetative phase observed populations. variation these phenotypic mainly due presence or few off‐type A highly genotype‐specific colonization new appears occur , then mediates formation uniform