Journal article

Six-rowed barley originated from a mutation in a homeodomain-leucine zipper I-class homeobox gene

Takao Komatsuda, Mohammad Pourkheirandish, Congfen He, Perumal Azhaguvel, Hiroyuki Kanamori, Dragan Perovic, Nils Stein, Andreas Graner, Thomas Wicker, Akemi Tagiri, Udda Lundqvist, Tatsuhito Fujimura, Makoto Matsuoka, Takashi Matsumoto, Masahiro Yano

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | NATL ACAD SCIENCES | Published : 2007

Abstract

Increased seed production has been a common goal during the domestication of cereal crops, and early cultivators of barley (Hordeum vulgare ssp. vulgare) selected a phenotype with a six-rowed spike that stably produced three times the usual grain number. This improved yield established barley as a founder crop for the Near Eastern Neolithic civilization. The barley spike has one central and two lateral spikelets at each rachis node. The wild-type progenitor (H. vulgare ssp. spontaneum) has a two-rowed phenotype, with additional, strictly rudimentary, lateral rows; this natural adaptation is advantageous for seed dispersal after shattering. Until recently, the origin of the six-rowed phenotyp..

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