Tesi etd-06252020-135700
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Tipo di tesi
Dottorato
Autore
KASSAW, SEYOUM ASEFIE
URN
etd-06252020-135700
Titolo
Genetic Diversity of Barley (Hordeum vulgare L.) Landraces Across the Ethiopian Landscape and Development of an Innovative interconnected Advanced Generation intercross (iMAGIC) Population
Settore scientifico disciplinare
AGR/07
Corso di studi
SCIENZE AGRARIE E BIOTECNOLOGIE - AGROBIODIVERSITY
Commissione
relatore Prof. PE', MARIO ENRICO
Parole chiave
- Barley
- iMAGIC
- QTL
- RILs
Data inizio appello
10/06/2022;
Disponibilità
completa
Riassunto analitico
Ethiopia is one of the world's richest regions for crop diversity, and recognized as a centre of diversity for barley (Hordeum vulgare L.). The cultivated barley is an ancient crop for human being about 10,000 years ago. It is the fourth most important cereal crop in the world as well as in Ethiopia. Ethiopian barley has huge sources of genetic variability which is not exploited yet but the national average (1.97 t/ha) of barley productivity is far below world average (3.31 t/ha). To improve productivities potential barley required the potential exploit of available genetic resources, create variability to increase the genetic base and utilization of molecular markers. This leads to effective breeding system. A novel breeding scheme called interconnected multi-parental advanced generation intercross (iMAGIC) has been adopted for the production of a multi-parental barley population in Ethiopian barley. Sixteen founder lines have been included based on their agronomic traits of importance. These founder lines were selected based on traits of interest, such as drought, yield, disease resistance, quality and rusticity for low input (marginal) environment. Five iMAGIC population obtained by crossing four founder lines and interconnected with on common recurrent parent. i.e. HB1307 it is wide adaptable varieties and having multiple traits of importance. Two and four ways crossing was conducted at Sirinka Agricultural Research Center. With huge effort and motivation we can accomplished our original minimum target 200 RILs per iMAGIC. Therefore, we obtained 1768 F5 iMAGIC barley RILs. Further molecular and phenotypic characterization and QTL mapping for drought tolerance and disease resistance traits will be conducted from these iMAGIC RILs.
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