Cold tolerance of seed germination for weedy rice populations in China

Clc Number:

Fund Project:

2013 public welfare industry (Agriculture) research;Major projects of new varieties of genetically modified organisms;Science and technology support of Jiangsu province; The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments

    Low temperature seriously affects the growth and distribution of rice.Weedy rice may evolve out new cold tolerance mechanisms in the natural selection process of rice field, which could provide new gene sources to breed cold tolerance cultivars. 75 weedy rice populations and their coexisting cultivars were collected and germination experiments under 8 different treatments were processed, which were with or without breaking dormancy, normal temperature(25℃)or low temperature(15℃), 7days or 14days , respectively. The results showed the germination ratio of weedy rice was extremely significant correlation with the germination of their coexisting cultivars under the treatment without or with breaking dormancy. Germination ratio of weedy rice with breaking dormancy was significantly or extremely significantly higher than that without breaking dormancy. Whether without or with breaking dormancy ,the results showed that cold tolerance of weedy rice was stronger than coexisting cultivar, which indicated weedy rice might had evolved a novel mechanism of cold tolerance at 15℃. Furthermore, the germination ratio of weedy rice and their coexisting cultivars at 25℃ was significant or extremely significant correlation with latitude, which showed that germination ratio increased and dormancy turned weaker with decreasing latitude.

    Cited by
Get Citation
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
  • Received:April 12,2016
  • Revised:June 27,2016
  • Adopted:June 28,2016
  • Online: January 17,2017
  • Published:
You are the th visitor 京ICP备09069690号-23
® 2024 All Rights Reserved
Supported by:Beijing E-Tiller Technology Development Co., Ltd.