Novel QTLs for growth angle of seminal roots in wheat (Triticum aestivum L.)

Alhosein Hamada, Miyuki Nitta, Shuhei Nasuda, Kenji Kato, Masaya Fujita, Hitoshi Matsunaka, Yutaka Okumoto

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


Aims: Because plants cannot change their environmental circumstances by changing their location, they must instead adapt to a wide variety of environmental conditions, especially soil conditions. One of the most effective ways for a plant to adapt to a given soil condition is by modifying its root system architecture. We aim to identify the genetic factors controlling root growth angle, a trait that affects root system architecture. Methods: The present study consisted of a genetic analysis of the seminal root growth angle in wheat; the parental varieties of the doubled haploid lines (DHLs) used in this study exhibited significantly different root growth directions. Using the 'basket' method, the ratio of deep roots (DRR; the proportion of total roots with GA > 45 degrees) was observed for evaluating deep rooting. Results: We were able to identify novel quantitative trait loci (QTLs) controlling the gravitropic and hydrotropic responses of wheat roots. Moreover, we detected one QTL for seminal root number per seedling (RN) on chromosome 5A and two QTLs for seminal root elongation rate (ER) on chromosomes 5D and 7D. Conclusions: Gravitropic and hydrotropic responses of wheat roots, which play a significant role in establishing root system architecture, are controlled by independent genetic factors.

Original languageEnglish
Pages (from-to)395-405
Number of pages11
JournalPlant and Soil
Issue number1-2
Publication statusPublished - May 2012


  • Gravitropism
  • Hydrotropism
  • Quantitative trait locus
  • Root growth angle
  • Root system architecture
  • Triticum aestivum L

ASJC Scopus subject areas

  • Soil Science
  • Plant Science


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