Abstract
The present study was conducted on 36 white lupin ( Lupinus albus L.) genotypes to estimate the genetic variability, broad sense heritability and genetic advance. The genotypes were grown in Randomized Complete Block Design with three replications at Research Site of Madda Walabu University and Gasera farmers’ farm land in southeastern part of Ethiopia in 2017. Data were collected on 18morpho-agronomic quantitative characters. The collected data were adjusted to mean values and the mean values were standardized to mean of zero and unity variance in order to minimize biases due to differences in scales of measurement and then subjected to analysis of variance using SAS 9.2software. The combined analysis of variance showed very highly significant (p < 0.0001) and highly significant (p < 0.01) differences among the studied genotypes for all characters, except for the traits number of primary branches (NPB) and pod thickness (PT) at both experimental sites. This indicated the existence of variability and hence the potential for selection and improvement for those characters other than NPB and PT. Wide range of variability was observed among the genotypes. The maximum performance value (9711.0 Kg ha-1) for the trait seed yield per hectare was observed on the genotype AC.26637; whereas the minimum (787.6Kg ha-1) was exhibited by the accession AC.239051. The phenotypic coefficient of variation (PCV) was greater than that of genotypic coefficient of variation (GCV) for all the traits indicating the influence of environmental variation to the total variation. Higher values of h 2 % were observed for the traits such as days to flowering (98%), pod length (97%) and seed yield per plot (SYP) (97%). Some traits, such as hundred seed weight and SYP showed high values of genetic advance as percent of mean. Hence, these traits can be used to improve white lupin through application of selection and other breeding methods. Keywords: Accession, GC V, genetic advance, heritability, PC V, White lupin, Yield related traits. DOI : 10.7176/FSQM/86-02 Publication date : April 30 th 2019
Highlights
White lupin belongs to genus Lupinus, subfamily papilionaceae and family Leguminosae, the third largest family [1, 2]
As Bale Zone is known by its bimodal rainy seasons, there are two cropping seasons in the region Ganna (Kiremt) which ranges from March to June and Bona (Bega) ranges from July to December; crops which are planted on Kiremt season are collected in Bega season which is the dry period of the area
The range and mean values in this study suggest the existence of sufficient variability among the tested white lupin genotypes for the majority of the characters studied and their considerable potential in the improvement of Lupinus albus L
Summary
White lupin belongs to genus Lupinus, subfamily papilionaceae and family Leguminosae ( called Genisteae or Fabaceae), the third largest family [1, 2]. White lupin was originated in the Balkin region of the northeast Mediterranean [3]. It has been traditionally cultivated for several thousands of years in the Mediterranean region and along the Nile valley where it has been originated. It is known to have been cultivated since ancient times in Greece, Italy, Egypt and Cyprus. It is occasionally grown in Kenya, Tanzania, Zimbabwe, South Africa, Mauritius, United States, Brazil and Chile [6]. The genetic diversity of white lupine and other species of Lupinus could be characterized using morphological and agronomical attributes [1, 2 & 10].
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