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| Content Provider | PubMed Central |
|---|---|
| Author | Li, Rongyao Zeng, Yijin Jie, Xu Wang, Qi Wu, Fengkai Cao, Moju Lan, Hai Liu, Yaxi Lu, Yanli |
| Copyright Year | 2015 |
| Abstract | Although the root system is indispensable for absorption of nutrients and water, it is poorly studied in maize owing to the difficulties of direct measurement of roots. Here, 103 maize lines were used to compare root architectures under well-watered and water-stressed conditions. Significant genetic variation, with medium to high heritability and significant correlations, was observed for root traits. Total root length (TRL) and total root surface area (TSA) had high phenotypical diversity, and TRL was positively correlated with TSA, root volume, and root forks. The first two principal components explained 94.01% and 91.15% of total root variation in well-watered and water-stressed conditions, respectively. Thus, TRL and TSA, major contributors to root variation, can be used as favorable selection criteria at the seedling stage. We found that stiff stalk and non-stiff stalk groups (temperate backgrounds) showed relatively higher mean values for root morphological diversity than the TST group (tropical/subtropical background). Of the tested lines, 7, 42, 45, and 9 were classified as drought sensitive, moderately sensitive, moderately drought tolerant, and highly drought tolerant, respectively. Seven of the 9 extremely drought tolerant lines were from the TST group, suggesting that TST germplasms harbor valuable genetic resources for drought tolerance that could be used in breeding to improve abiotic stress tolerance in maize. |
| Related Links | http://dx.doi.org/10.1270/jsbbs.65.298 |
| Ending Page | 307 |
| Page Count | 10 |
| Starting Page | 298 |
| File Format | |
| ISSN | 13473735 |
| e-ISSN | 13473735 |
| Journal | Breeding Science |
| Issue Number | 4 |
| Volume Number | 65 |
| Language | English |
| Publisher | Japanese Society of Breeding |
| Publisher Date | 2015-09-01 |
| Access Restriction | Open |
| Rights Holder | Japanese Society of Breeding |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Agronomy and Crop Science |
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