Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes
Plant selections with desirable root characters have been a major objective in breeding drought resistant variety of rice. Present study was therefore conducted to study the performance of rice varieties for yield, yield contributing characters, root characters and their association with drought t...
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| Format: | Article |
| Language: | English |
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Indian Society of Plant Breeders
2018-09-01
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| Series: | Electronic Journal of Plant Breeding |
| Subjects: | |
| Online Access: | http://ejplantbreeding.org/index.php/EJPB/article/view/2560 |
| _version_ | 1818195092960182272 |
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| author | R. Pushpam S. Manonmani N. Vishnu Varthini and S. Robin |
| author_facet | R. Pushpam S. Manonmani N. Vishnu Varthini and S. Robin |
| author_sort | R. Pushpam |
| collection | DOAJ |
| description | Plant selections with desirable root characters have been a major objective in breeding drought resistant variety of rice.
Present study was therefore conducted to study the performance of rice varieties for yield, yield contributing characters, root
characters and their association with drought tolerance. Drought resistant entries had recorded higher root thickness, root
volume and deep root system than the susceptible genotypes. Correlation studies revealed that, all the characters showed
positive and significant correlation with single plant yield. Drought score on the other hand exhibited significant negative
correlation with yield. Spikelet fertility positively correlated with 1000 grain weight and yield but negatively correlated with
drought score. Root depth was found positively correlated with root volume, root thickness, fresh weight of shoot and root
and dry weight of shoot and root and exhibited significant negative correlation with drought score. This means that deep
rooted varieties tend to be drought tolerant and have thick roots. Strong association between drought score and root thickness
suggested that this character to be an important trait in identifying varieties for use in upland rice improvement for drought
tolerance. Hence the characters to be given importance in selection are panicle/m2, spikelet fertility and 1000 grain weight
as they exhibited highly positive correlation with grain yield and also a positive inter-correlation among themselves.
Selection based on root thickness and root depth is highly suitable for identifying varieties for use in upland rice
improvement for drought tolerance. |
| first_indexed | 2024-12-12T01:12:42Z |
| format | Article |
| id | doaj.art-854c59cb84a54c639981d88727a959b1 |
| institution | Directory Open Access Journal |
| issn | 0975-928X |
| language | English |
| last_indexed | 2024-12-12T01:12:42Z |
| publishDate | 2018-09-01 |
| publisher | Indian Society of Plant Breeders |
| record_format | Article |
| series | Electronic Journal of Plant Breeding |
| spelling | doaj.art-854c59cb84a54c639981d88727a959b12022-12-22T00:43:26ZengIndian Society of Plant BreedersElectronic Journal of Plant Breeding0975-928X2018-09-019385686210.5958/0975-928X.2018.00106.0Studies on yield, root characters related to drought tolerance and their association in upland rice genotypesR. PushpamS. ManonmaniN. Vishnu Varthini andS. RobinPlant selections with desirable root characters have been a major objective in breeding drought resistant variety of rice. Present study was therefore conducted to study the performance of rice varieties for yield, yield contributing characters, root characters and their association with drought tolerance. Drought resistant entries had recorded higher root thickness, root volume and deep root system than the susceptible genotypes. Correlation studies revealed that, all the characters showed positive and significant correlation with single plant yield. Drought score on the other hand exhibited significant negative correlation with yield. Spikelet fertility positively correlated with 1000 grain weight and yield but negatively correlated with drought score. Root depth was found positively correlated with root volume, root thickness, fresh weight of shoot and root and dry weight of shoot and root and exhibited significant negative correlation with drought score. This means that deep rooted varieties tend to be drought tolerant and have thick roots. Strong association between drought score and root thickness suggested that this character to be an important trait in identifying varieties for use in upland rice improvement for drought tolerance. Hence the characters to be given importance in selection are panicle/m2, spikelet fertility and 1000 grain weight as they exhibited highly positive correlation with grain yield and also a positive inter-correlation among themselves. Selection based on root thickness and root depth is highly suitable for identifying varieties for use in upland rice improvement for drought tolerance.http://ejplantbreeding.org/index.php/EJPB/article/view/2560ricedrought tolerancecorrelation studiesroot charactersyield |
| spellingShingle | R. Pushpam S. Manonmani N. Vishnu Varthini and S. Robin Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes Electronic Journal of Plant Breeding rice drought tolerance correlation studies root characters yield |
| title | Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes |
| title_full | Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes |
| title_fullStr | Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes |
| title_full_unstemmed | Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes |
| title_short | Studies on yield, root characters related to drought tolerance and their association in upland rice genotypes |
| title_sort | studies on yield root characters related to drought tolerance and their association in upland rice genotypes |
| topic | rice drought tolerance correlation studies root characters yield |
| url | http://ejplantbreeding.org/index.php/EJPB/article/view/2560 |
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