Erect panicle super rice varieties enhance yield by harvest index advantages in high nitrogen and density conditions

Liang TANG, Hong GAO, Hirooka Yoshihiro, Homma Koki, Nakazaki Tetsuya, Tian sheng LIU, Shiraiwa Tatsuhiko, Zheng jin XU

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The erect panicle (Ep) type is an important characteristic for japonica super rice in Northeast China and plays a significant role in enhancing yield. The Ep type is considered to be a genetic ideotype resource to the japonica super rice group by virtue of its agronomic advantages such as grain number per panicle and biomass. This study addresses the effects of nitrogen and planting density conditions on yielding performance regarding panicle type (PT) using the recombinant inbred line (RIL) population derived from the cross between an Ep variety Liaogeng 5 and non-Ep variety Wanlun 422. The genetics underlying the Ep type proved to be robust not only for panicle-type optimization but also plant height, panicle length, flag leaf length and seed density. We also found that regardless of nitrogen and density, correlation between harvest index (HI) and plant height was not significant in Ep type whatever the nitrogen and density. The application of Ep type provides a potential strategy for yield improvement by increasing biomass through HI maintainable in rice.

Original languageEnglish
Pages (from-to)1467-1473
Number of pages7
JournalJournal of Integrative Agriculture
Volume16
Issue number7
DOIs
Publication statusPublished - 2017 Jul
Externally publishedYes

Keywords

  • erect panicle
  • harvest index
  • nitrogen
  • planting density
  • super rice

ASJC Scopus subject areas

  • Food Science
  • Biochemistry
  • Ecology
  • Food Animals
  • Animal Science and Zoology
  • Agronomy and Crop Science
  • Plant Science

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