GLOBAL NETWORK OF BANGLADESHI BIOTECHNOLOGISTS

NEWS

Resequencing Data Indicate a Modest Effect of Domestication on Diversity in Barley

Resequencing Data Indicate a Modest Effect of Domestication on Diversity in Barley

Dhaka, 12 Feb., ’14. In an article titled, “Re-sequencing Data Indicate a Modest Effect of Domestication on Diversity in Barley: A Cultigen With Multiple Origins,” published in the current issue of Journal of Heredity (vol.105: 253-264), the lead author Peter I. Morrell and three of his associates at the Department of Agronomy and Plant Genetics, University of Minnesota and the Department of Ecology and Evolutionary Biology, University of California, Irvine, CA  made a comparison of nucleotide sequence diversity in wild and cultivated barley (Hordeum vulgare ssp. spontaneum and ssp. vulgare) at seven nuclear loci comprising 9296bp. The reference sequence was  from Hordeum bulbosum. One of their objectives of their study was to infer the ancestral state of mutations. The samples comprised 36 accessions of cultivated barley of which 23 were land races  and 13 cultivated lines and genetic stocks. Also included in the study were their comparisons to either 25 or 45 accessions of wild barley for the same loci. Nucleotide sequence diversity estimates indicate that land races retain about 80% of the diversity in wild barley. The primary population structure of wild barley is reflected in significant differentiation at all loci in wild accessions and at 3 of 7 loci in land races. Furthermore, the study revealed that oriental land races have slightly higher diversity than their “Occidental” counterparts. The study  also suggests more admixture from Occidental land races than their  oriental counterparts.  Based on θπ for silent sites, the results further suggest that modern Western cultivars have ~73% of the diversity found in land races and ~71% of the diversity in wild barley.

Recent News

Calendar

February 2017
Su Mo Tu We Th Fr Sa
29 30 31 1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 1 2 3