Genetic Variability and Association Among Agronomic Characters in Selected Field Pea (Pisumsativum L.) Genotypes at Bale Zone, Sinana Research Center, Oromia Region, Ethiopia
Benti Ofga,
Yohannis Petros
Issue:
Volume 5, Issue 6, December 2017
Pages:
63-75
Received:
29 March 2017
Accepted:
25 April 2017
Published:
11 November 2017
Abstract: Field pea (Pisumsativum L.) is an annual herbaceous legume belonging to the family Fabaceae that adapted to cool moist climate with moderate temperature. The species P. sativumis dominant in Ethiopia even though wild and primitive forms are also known to exist in the high elevation of the country. No sufficient work has been done for understanding and describing the nature and extent of genetic variability on Field Pea. Thus use of genetic variability is suggested to alleviate the shortage of released varieties in Field pea. The studies of association characters solve the low yield of field pea in Ethiopia. Therefore, the present study was conducted to study genetic variability and association among agronomic characters of field pea (Pisumsativum L.) genotypes. The field experiment was conducted using 29 varieties and 7 accessions at Sinana Agricultural Research Centre during 2013/14 main growing season. Treatments were arranged in Simple Lattice design with two replications. The results obtained revealed that the mean squares of the genotypes were highly significant for most of the characters (p < 0.05) except for days to emergence, days to flowering, pods per plant, above ground biomass and harvest index implying that wide range of variability has been obtained for the traits studied. The genotypic coefficient of variation ranged from 2.91% for plant height to 37.9% for above ground biomass, while phenotypic coefficient of variation ranged from 6.28% for days to maturity to 62.6% for above ground biomass. The estimated broad sense heritability ranged from 6.9% for yield per plant to 93.0.0% for pod length. Correlation between different traits and seed yield indicated that there was marked positive and highly significant association of seed yield with days to emergence (rg=0.296**), days to maturity (rg=0.184**), seeds per pod (rg=0.325**) and harvest index (rg=0.341**) indicating the yield improvement perhaps be contributed to changes in these traits. The path analysis at phenotypic level revealed that maximum positive direct effect was exerted by 100 seed weight (1.754) followed by pod length (2.211) and days to emergence (2.056). These traits best contributing to yield variation that emphasis by breeders for future yield improvement of the crop. It can be conclude that Field pea yield can be successfully improved by studying genetic variability and its agronomic characters.
Abstract: Field pea (Pisumsativum L.) is an annual herbaceous legume belonging to the family Fabaceae that adapted to cool moist climate with moderate temperature. The species P. sativumis dominant in Ethiopia even though wild and primitive forms are also known to exist in the high elevation of the country. No sufficient work has been done for understanding ...
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High-Throughput Sequencing Reveals miRNAs Affecting Follicle Development in Chicken
Quan Zhang,
Shanshan Li,
Bingwang Du
Issue:
Volume 5, Issue 6, December 2017
Pages:
76-84
Received:
5 October 2017
Accepted:
19 October 2017
Published:
16 November 2017
Abstract: As the derivative of chicken skin, hair follicle is capable of self-renew. Its proliferation and differentiation result in hair formation. MicroRNAs (miRNAs) can effectively regulate gene expression at the post-transcriptional level and play a critical role in tissue growth, development. In this study, we used next generation sequencing technology sequenced miRNAs of the hair follicle derived from the 13 day-old chicken (Gallus gallus) embryos in which from Kirin chicken and Huaixiang chicken that feathers having morphogenesis with significantly different curling. A population of conserved miRNAs was identified. These conserved miRNAs were derived from 638 homologous hairpin precursors across 5 animal species. We identified a total of 645 miRNAs in the chicken embryos. Among them, 11 differentially expressed miRNAs were identified (> ±2 Fold, p value <0.05) by comparing Kirin chicken and Huaixiang chicken. Several gene ontology (GO) biology processes and the WNT, BMP and TGF-β signaling pathways were found to be differentially expressed miRNAs as part of hair follicle development process. The miR-1623 has an effect on WNT4 and involved in hair follicle cell development. This study has identified miRNAs that associated with the chick embryonic hair follicle development and identified some target miRNAs for further research into their role played in feather growth.
Abstract: As the derivative of chicken skin, hair follicle is capable of self-renew. Its proliferation and differentiation result in hair formation. MicroRNAs (miRNAs) can effectively regulate gene expression at the post-transcriptional level and play a critical role in tissue growth, development. In this study, we used next generation sequencing technology ...
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