Data di Pubblicazione:
2014
Citazione:
Genetics of tillering in rice and barley / A. Sayed Hussien Elsayed, E. Tavakol, D.S. Horner, M. Muñoz Amatriaín, G.J. Muehlbauer, L. Rossini. - In: THE PLANT GENOME. - ISSN 1940-3372. - 7:1(2014). [10.3835/plantgenome2013.10.0032]
Abstract:
Tillering, or the production of lateral branches (i.e. culms), is an important agronomic trait that
determines shoot architecture and grain production in grasses. Shoot architecture is based on the
actions of the apical and axillary meristems (AXMs). The shoot apical meristem (SAM) produces
all above-ground organs including: AXMs, leaves, stems and inflorescences. In grasses like rice and
barley, vegetative AXMs form in the leaf axil of lower leaves of the plant and produce tillers
(branches). Tiller development is characterized by three stages including: (1) AXM initiation, (2)
bud development, and (3) outgrowth of the axillary bud into a tiller. Each tiller has the potential to
produce a seed-bearing inflorescence and, hence, increase yield. However, a balance between
number and vigor of tillers is required, as unproductive tillers consume nutrients and can lead to a
decreased grain production. Due to its agronomic and biological importance, tillering has been
widely studied and numerous works demonstrate that the control of AXM initiation, bud
development and tillering in the grasses is via a suite of genes, hormones and environmental
conditions. In this review, we describe the genes and hormones that control tillering in two key
cereal crops; rice and barley. In addition, we discuss how the development of new genomics tools
and approaches coupled with the synteny between the rice and barley genomes are accelerating the isolation of barley genes underlying tillering phenotypes.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
A. Sayed Hussien Elsayed, E. Tavakol, D.S. Horner, M. Muñoz Amatriaín, G.J. Muehlbauer, L. Rossini
Link alla scheda completa: