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Restriction Fragment Length Polymorphisms in Landrace Barleys from Ethiopia in Relation to Geographic, Altitude, and Agro‐Ecological Factors
Author(s) -
Demissie Abebe,
Bjørnstad Åsmund,
Kleinhofs Andris
Publication year - 1998
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1998.0011183x003800010040x
Subject(s) - biology , genetic diversity , restriction fragment length polymorphism , hordeum vulgare , altitude (triangle) , diversity (politics) , geographical distance , genetics , ecology , evolutionary biology , poaceae , population , genotype , demography , gene , geometry , mathematics , sociology , anthropology
Forty‐three landrace (LR) barley ( Hordeum vulgare ) populations from a wide agro‐ecological range in Ethiopia were assayed for RFLPs with 31 probes distributed over all barley chromosomes. Diversity between LRs was analyzed by Nei's genetic similarity ( F ) and genetic distance ( d ) parameters. The 43 populations were represented either by one single line (Set 1) or by four to five lines in a subset of populations(Set 2). The greatest diversity between LRs was observed in Set 1. However, many populations appeared rather similar in RFLP patterns. Relationships between LRs were sharply altered by including the within LR‐diversity component (Set 2), and the average level between‐LR differentiation was reduced compared with Set 1. The within‐LR diversity was similar in magnitude to that for geographical regions. Levels of within‐LRR FLP diversity were poorly correlated with morphological and isozyme variations in the same LR or region. The results highlight the critical role of a sampling strategy that includes both within and between LR components, which is important both to large scale and core collections.