alexa Genetic Analysis Of Components Of Salinity Tolerance In Rice (Oryza Sativa L.) | 21662
ISSN: 2168-9881

Agrotechnology
Open Access

OMICS International organises 3000+ Global Conferenceseries Events every year across USA, Europe & Asia with support from 1000 more scientific Societies and Publishes 700+ Open Access Journals which contains over 50000 eminent personalities, reputed scientists as editorial board members.

Open Access Journals gaining more Readers and Citations
700 Journals and 15,000,000 Readers Each Journal is getting 25,000+ Readers

This Readership is 10 times more when compared to other Subscription Journals (Source: Google Analytics)

3rd International Conference on Agriculture & Horticulture

M Sudharani, P Raghava Reddy, V Ravindra Badu, G Hariprasad Reddy and Ch. Surendra Raju
ScientificTracks Abstracts: Agrotechnol
DOI: 10.4172/2168-9881.S1.011
Abstract
The present investigation was carried out at Directorate of Rice Research, Rajendranagar, Hyderabad and Agricultural Research Station, Machilipatnam during rabi, 2009-10 and Kharif, 2010 with an aim to evaluate 24 rice genotypes for salinity tolerance, to estimate heterosis and combining ability involving eight parents and 28 F1s (Crossed in diallel manner) for 16 (including yield and salt tolerance related physiological) traits. Further, the variability and genetic parameters were estimated for physiological, yield and its component traits under coastal saline soil conditions. Through screening at various levels of salt stress at seedling stage, the 24 rice genotypes were categorized into three classes based on Na+/K+ ratio and salt injury score. The cultivars viz., RPBio-226, Swarna, Krishna Hamsa, Sampada, NLR-3042, NLR- 145, BPT-5204, Varadan, BPT-2231, BPT-2270 and Dhanarasi were graded as susceptible to salinity, while the genotypes CSR- 27, CSR-30, CST7-1, CSRC(S)2-1-7,Santhi,NLR-33359,NLR-3041, NLR-33892 and NLR-34449 were found to be moderately tolerant and the cultivars SR26B, CSRC(S)5-2-2-5, CSR-4 and SCRC(S) 7-1-4 were identified to be tolerant to salt stress. The mean value of the parents indicated that the cultivar SR26B excelled others by expressing significantly superior mean values for nine traits The next best parent was CSRC(S)7-1-4 for eight traits. The genotypes CSRC(S)5-2-2-5 was also adjudged as desirable for development of salt tolerant varieties coupled with high yield. Among the 28 hybrids studied, SR26B x CST7-1 and Swarna x CSRC(S)7-1-4 were superior as they exhibited high mean performance for majority of the characters studied. Estimation of genetic parameters revealed the moderate opportunities to improve grain yield plant-1 and panicle weight in the material studied. Further, the high heritability estimates for number of total tillers plant-1, number of productive tillers plant-1, panicle length, panicle weight, number of filled grains panicle-1, spikelet fertility per cent, 1000- grain weight, grain yield plant-1, SES for visual salt injury and Na+/K+ ratio coupled with high genetic advance as per cent of indicated the scope for rapid improvement these traits through selection under saline soil conditions. The examination of the heterotic trends revealed that the hybrid, Swarna x CSRC(S)7-1-4 manifested significant heterotic expression over mid and better-parents for number of filled grains panicle-1, grain yield plant-1, root / shoot ratio, harvest index, SPAD chlorophyll meter values and desirable negative heterosis for Na+/K+ ratio. The GCA and SCA variances revealed the preponderance of non-additive gene action for all the characters under both the environments, except for SPAD chlorophyll meter readings under normal situation under saline conditions, indicating the option of population improvement methods rather the direct selection to breed for salinity tolerance. Based on gca effects, the genotypes viz., CSRC(S)5-2-2-5, SR26B and CSRC(S)7-1-4 were found to be good combiners for yield attributing as well as salt tolerance related traits (number of tillers plant-1, number of productive tillers plant-1, panicle length, number of filled grains panicle-1, 1000-grain weight, SES for visual salt injury, harvest index, Na+/K+ ratio and yield reduction per cent) including yield. Based on sca effects, the hybrids namely, SR26B x CST-7-1, RPBio-226 x CSR-30 and CSR-27 x CSRC(S)5-2-2-5 were adjudged as the best hybrids for yield attributes as well as salt for tolerance related physiological traits. Based on per se performance, sca effects and heterobeltiosis, the hybrids viz., Swarna x CSRC(S)7-1-4, RPBio-226 x CSR-30 and CST-7-1 x CSRC(S)5-2-2-5 were identified to be promising. From the overall investigation it is inferred that there is a greater scope to develop high yielding varieties tolerant to salinity by monitoring parents with genetic diversity and selecting the elite lines based on the traits viz., more number of filled grains panicle-1, higher spikelet fertility per cent, longer panicle with more test weight and low visual salt injury symptoms as well as Na+/K+ ratio and pursuing the cross combination Swarna x CSRC(S)7-1-4 considering to the logical end.
image PDF   |   image HTML
 
Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2018-19
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2018 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version
Leave Your Message 24x7