Genetic divergence among accessions of Axonopus jesuiticus x A. scoparius based on morphological and agronomical traits

Abstract

This study had the objective of assessing the genetic divergence in giant missionary grass (Axonopus jesuiticus x A. scoparius) germplasm based on morphological and agronomic traits. Five accessions were evaluated in the field: V14337, V14403, V14404, V14405 and V14406. Three contrasting groups were formed using the UPGMA clustering method: V14337 and V14404 formed one group, V14403 and V14405 formed another, and V14406 was isolated from the other accessions. The most striking traits for the identification of the accessions were the height of the plant and the change color of the leaf. Only V14406 accession had purplish green leaves. The other four accessions differed with regards to plant height and dry matter production, with superiority of V14337 and V14404 accessions. The high similarity, as assessed by the mean Euclidean distance, suggests that V14337 and V14404 share the same genotype. The genotypic variability among accessions indicates their potential use in breeding programs.

Effects of nitrogen fertilization and cutting intensity on the agronomic performance of warm‐season grasses

“…Marandu (Ub, palisadegrass). Giant missionary is a vegetatively propagated grass, native to South America, and it results from the spontaneous hybridization of Axonopus jesuiticus and Axonopus scoparius (Lajús et al ., ; Sheffer‐Basso et al ., ) characterized by high productivity and adaptation to acid soils (Tcacenco and Soprano, ). Tifton 85 bermudagrass hybrid resulted from a cross between Tifton 68 ( Cynodon nlemfuensis ) and Cynodon dactylon accession PI 290884 and is an important warm‐season perennial grass for high‐yielding cows.…”

Tolerance to preharvest sprouting and yield of wheat genotypes from different breeding programs

“…In traits related to PHS and GY, the analysis of performance was efficient to discriminate the variability of wheat cultivars (Fofana et al, 2009;Gooding et al, 2012). The relative contribution of traits for genetic distance complements performance studies, since traits of reduced contribution would not be the ideal target because they decrease selection efficiency (Scheffer-Basso et al, 2014).…”