University of Tasmania
Browse

File(s) not publicly available

Rice Plant Architecture: Molecular Basis and Application in Breeding

chapter
posted on 2023-05-22, 20:01 authored by Bai, S, Steven SmithSteven Smith, Li, J
Shoot architecture in rice is determined by the number of leaves, stems, and panicles and by their size, shape, and position on the plant. These factors determine the effectiveness of light interception, the degree of competition between neighboring plants, and ultimately the number and mass of grains produced. Plant hormones including auxin, cytokinins, gibberellins, strigolactones, and brassinosteroids play key roles in regulating shoot development and architecture. The SEMI-DWARF1 (SD1) gene has contributed greatly to rice yields by redirecting resources from elongation growth to panicle development, providing resistance to lodging and increased harvest index. The mechanism of control of tillering by strigolactone signaling has been determined in recent years providing valuable information to help understand the timing and number of tillers produced. Genes that have been selected for increased yield have now been identified at the molecular level such as IDEAL PLANT ARCHITECTURE1 (IPA1), Grain size 3 (GS3), and GRAIN NUMBER, PLANT HEIGHT, AND HEADING DATE 7 (GHD7). The function of these genes in controlling gene transcription and shoot development is helping us to understand the molecular basis of plant architecture. The future offers great potential for the rational design of plant architecture using molecular breeding techniques.

History

Publication title

Rice Genomics, Genetics and Breeding

Editors

Takuji Sasaki and Motoyuki Ashikari

Pagination

129-154

ISBN

978-981-10-7460-8

Department/School

School of Natural Sciences

Publisher

Springer

Place of publication

Singapore

Extent

28

Repository Status

  • Restricted

Socio-economic Objectives

Rice; Expanding knowledge in the biological sciences

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC