Genotype by trait biplot analysis to study associations and profiles of Ethiopian white lupin (Lupinus albus L.) landraces

Abstract

Limited information is available on trait relations and profiles of white lupin landraces in tropical growing conditions including Ethiopia. The objectives of this study were to understand the relationships among traits, and to document trait profile of Ethiopian white lupin landraces. As a component of this study, two sets of experiments were conducted. The first comprehensive experiment that consisted of 143 accessions collected from major lupin growing areas of Ethiopia was evaluated at Merawi and the second experiment that consisted of 12 selected accessions was evaluated across six locations. In both experiments, significant variations were observed among the accessions for most studied traits. Higher heritability and genetic advance as percent of mean was observed for grain yield, indicating the possibility of improving this trait through selection. Genotype by trait biplots captured 55% -66% of the variations due to genotype by trait interactions. Trait association and trait profile biplots were constructed for highland, mid altitude and low land environments, and across all locations. Different patterns of associations and genotype (accession) by trait interactions were observed in different environments. However, genotype by trait biplots consistently indicated that grain yield had positive associations with most of the traits; especially, with number of pods per plant, plant height and seeds per pod. The study identified some accession with desirable performances as good for specific trait and/or trait groups that could be considered as sources of genes for the traits they have best performed. G8 consistently showed higher grain yield, G2 had higher number of branches and higher number of seeds per plant, G7 had more number of pods per plant and larger seed size and G4 produced longer pods. The accessions used in this study were found to be useful sources for genetic variability for future breeding that targets to improve grain yield and other agronomic traits of white lupin in Ethiopia.

Characterization and Diversity of Peppers (Capsicum spp.) Genotypes Based on Morphological Traits Using Multivariate Analysis

“…The most representative variables are those that form the smallest angles with the line that presents the circle formed with the arrow, i.e., with the medium [31]. In addition, the ideal variable should be able to discriminate genotypes and represent the other characteristics, thus, it should present high CP1 (greater discriminatory capacity) and low CP2 (greater representativity) [28,29] Studies with Capsicum using biplot analysis are not yet described in the literature, however, recent studies have reported success in discriminating promising genotypes in other cultures, based on this type of graph, with PC values ranging from 60 to 80% [29,32].…”

Molecular genetic diversity and population structure of Ethiopian white lupin landraces: Implications for breeding and conservation

“… This map is “Reprinted from [ 33 ] under a CC BY license, with permission from [AJCS], original copyright [2017]”. …”

The Use of Lupin as a Source of Protein in Animal Feeding: Genomic Tools and Breeding Approaches

“…Genotypes with anthracnose resistance and late flowering cannot produce pods and fill seeds at the end of the season [ 82 ]. Moreover, the relationships among lupin traits are significantly influenced by the fluctuating conditions of the growing environments [ 90 , 91 ]. Thus, genotype selection should be based on multiple trait data in variable environments within the target regions [ 78 ].…”