-
Phenotypic Characterization of Indigenous Goat Population in Southern, Ethiopia
Teshager Muluneh,
Wondimagegn Tadesse
Issue:
Volume 10, Issue 3, June 2022
Pages:
31-38
Received:
28 April 2022
Accepted:
28 May 2022
Published:
8 June 2022
Abstract: Indigenous goat populations in Ethiopia contain a number of significant genetic features, including the ability to function better under limited input and climatic stress, resistance to viral illnesses and parasites, as well as heat stress. Molecular or phenotypic characterisation is required to offer comprehensive database information of variance among goat populations for sensible utilization of this crucial trait and goat resources. Even though genetic characterization for Arsi-Bale and Woyito-Guji breeds have been done, which are distributed in southern part of Ethiopia, due to overlapping of the distribution of these two breeds in the study area the present phenotypic characterization of indigenous goat was initiated. Despite the studies done, information on phenotypic characteristics and production systems of some indigenous goat populations in study area is still scanty. Besides, there was little intervention works so far on the improvement of production and productivity of local goat breeds in the area. A study was conducted at Abaya and Yirgachafe districts to characterize indigenous goat types phenotypically. Data were collected through field measurements and visual observation of qualitative traits. Totally 540 goats were used for metric and morphometric measurement. Results of the study revealed that the goat populations found in Abaya and Yirgachafe district were different characteristics which are physically Abaya goats were closest with Arsi-Bale whereas yirgachafee with Woyto-Guji which are mostly distributed goat breeds in southern Ethiopia. The dominant coat color pattern in study area was plain, patchy, and spotted with proportions of 55.19, 37.04, and 7.78% and 46.67, 38.89, and 14.44% in Abaya and Yirgachafee district respectively. A strong and positive correlation (r = 0.83, 0.76) was observed between heart girth and body weight for male and female goat populations respectively. Generally, the indigenous goat population has its own difference in its morphological and morphometric traits. Traits have their own economic contribution. Therefore, identifying these important traits for further genetic improvements, conservation and sustainable utilization of the genetic resources of the diversified goat population is important.
Abstract: Indigenous goat populations in Ethiopia contain a number of significant genetic features, including the ability to function better under limited input and climatic stress, resistance to viral illnesses and parasites, as well as heat stress. Molecular or phenotypic characterisation is required to offer comprehensive database information of variance ...
Show More
-
Genotype by Environment Interaction and Stability Analysis in Ethiopian Mustard (Brassica Carinata A Braun) Using AMMI Biplot and Stability Parameters
Mohammed Abu,
Berhanu Mengistu,
Tilahun Molla
Issue:
Volume 10, Issue 3, June 2022
Pages:
39-44
Received:
17 May 2022
Accepted:
13 June 2022
Published:
27 June 2022
Abstract: The objective of this study was to evaluate genotype by environment interaction and yield stability in multi environmental locations in Ethiopia. Ten Ethiopian mustard genotypes along with one local check and one standard check were evaluated for seed yield at four locations namely, Holeta, Debrezeit, Asasa and Arsi Negelle during the growing season of 2020/2021. The experimental design was randomized complete block design with four replication. Analysis of variance, Ammi biplot and stability parameters were applied for evaluation of genotype by environment interaction and stability. The analysis of variance showed significant differences (P<0.05) among genotypes, locations and GXE interaction for yield. One of the most widely used models to analyses genotype-by-environment data is the additive main effects and multiplicative interaction (AMMI) model. The AMMI1 biplot showed that genotypes G7, G5, and G8 are less affected by the interaction of genotypes and environmental changes and genotypes G1, G7, G8 and G11 are stable genotypes across locations. The AMMI2 biplot indicates that environments E4 and E3 do not exerted strong interaction forces, while strong interactions forces was observed for E1 and E2. AMMI2 also revealed that genotypes G6, G10, G7, G2, G1 and G5 are less affected by the environmental change whereas the remains are more responsive to environmental change.
Abstract: The objective of this study was to evaluate genotype by environment interaction and yield stability in multi environmental locations in Ethiopia. Ten Ethiopian mustard genotypes along with one local check and one standard check were evaluated for seed yield at four locations namely, Holeta, Debrezeit, Asasa and Arsi Negelle during the growing seaso...
Show More
-
Potential Biocontrol Agents Diversity for Coffee Leaf Rust Hemileiavastatrix from Southwesten Ethiopia
Issue:
Volume 10, Issue 3, June 2022
Pages:
45-52
Received:
10 May 2022
Accepted:
6 June 2022
Published:
29 June 2022
Abstract: Coffee leaf rust (CLR), caused by Hemileiavastatrixis the main coffee disease, occurring in the main coffee producing countries worldwide. Effective management of CL Rintegrated approch including the development of resistant varieties, cultural management, biocontrol and chemicals. Considering both the potential source of potential bioagents by this ecological niche and the possibility of practical uses as a tool to be deployed against coffee leaf rust. White colourmycoparasitic growth is often observed on H. vastatrixpustules. The common report is a complex of “white colony forming-taxa” which has been promptly labeled as Verticilliumsp., Lecanicilliumsp. or, at a supposedly more precise level, as Verticilliumlecanii. Taxonomic information about such potential biocontrol fungi is lacking in Ethiopia. In order to investigate the identity of mycoparasites of H. vastatrixand to obtain potential biocontrol agents for the pathogen of coffee, a survey of fungicolous associated with coffee leaf rust was conducted at major coffee producing areas of Ethiopia. One hundred and ten different mycoparasite isolates from H. vastatrixpustules have been captured and characterized. The identified isolates belonging to twelve genera: Akanthomyces, Alternaria, Cladosporium, Fusarium, Gonatophragmium, Lecanicillium, Ochroconis, Paraphaeosphaeria, Phoma, Pleurodesmospora, Sarcopodiumand Simplicillium. Biological control of CLR with mycoparasites remains promising possibility for the future. Nevertheless, without firm taxonomic knowledge and the aid of modern tools, the rapid and precise identification of potential biocontrol agents remain a bottleneck. Therefore, morphological and cultural characterization of these mycoparasites should be supported with appropriate molecular tools and the phylogenic tree approach. Although very little is known about mycoparasites, this work provide piece of informationaboutpotential biocontrolagents deserving more attention by plant pathologists and related scientists for exploiting their service in fight against CLR.
Abstract: Coffee leaf rust (CLR), caused by Hemileiavastatrixis the main coffee disease, occurring in the main coffee producing countries worldwide. Effective management of CL Rintegrated approch including the development of resistant varieties, cultural management, biocontrol and chemicals. Considering both the potential source of potential bioagents by thi...
Show More
