e-journal

Adaptive evolution of a‐amylase genes in wild barley (Hordeum spontaneum) on micro and macro scales

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Alpha‐amylases play essential roles in germination, and the malting and brewing processes, by hydrolyzing starch granules present in the endosperm of barley. Hordeum spontaneum C. Koch, the progenitor of cultivated barley
that harbors rich genetic diversity, was collected from seven different environments. To investigate the influence of
microclimatic ecological divergence on a‐amylase, single nucleotide polymorphisms (SNPs) in amy genes from these
populations were determined. A total of 16 and 17 SNPs were detected in the coding sequences of amy1 and amy2,
respectively, from the seven wild barley populations. Among these SNPs, three in amy1‐2 and nine in amy2‐2 were
significantly associated with ecological factors. The genetic divergence of amy sequences was significantly different
among the populations. Natural microclimatic selection was apparently the major evolutionary driving force causing
interslope divergence and adaptive evolution of these genes. The genetic variation in amy1‐2 and amy2‐2 was at least
partly ecologically determined in these populations, representing adaptive patterns generated by natural selection. The
SNPs were apparently generated by natural selection in climatic environmental patterns at both the micro (“Evolution
Canyon”) and macro (across Israel, Galilee, and Negev) scales.

Key words adaptive evolution, alpha‐amylases, Hordeum spontaneum, SNP.

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Ketersediaan

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Informasi Detail

Judul Seri

Journal of Systematics and Evolution

No. Panggil

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Penerbit

: Institute of Botany., 2014

Deskripsi Fisik

Journal of Systematics and Evolution 52 (6): 765–778 (2014)

Bahasa

English

ISBN/ISSN

doi: 10.1111/jse.121

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

BIOLOGI

Info Detail Spesifik

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Pernyataan Tanggungjawab

Wati/Agus

Versi lain/terkait

Lampiran Berkas

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