Keyword search (3,448 papers available)


Ecosystem-level carbon storage and its links to diversity, structural and environmental drivers in tropical forests of Western Ghats, India.

Author(s): Kothandaraman S, Dar JA, Sundarapandian S, Dayanandan S, Khan ML

Sci Rep. 2020 Aug 10;10(1):13444 Authors: Kothandaraman S, Dar JA, Sundarapandian S, Dayanandan S, Khan ML

Article GUID: 32778785
The dark cloud with a silver lining: Assessing the impact of the SARS COVID-19 pandemic on the global environment.

Author(s): Lal P, Kumar A, Kumar S, Kumari S, Saikia P, Dayanandan A, Adhikari D, Khan ML

Sci Total Environ. 2020 May 08;732:139297 Authors: Lal P, Kumar A, Kumar S, Kumari S, Saikia P, Dayanandan A, Adhikari D, Khan ML

Article GUID: 32408041
Late-spring frost risk between 1959 and 2017 decreased in North America but increased in Europe and Asia.

Author(s): Zohner CM, Mo L, Renner SS, Svenning JC, Vitasse Y, Benito BM, Ordonez A, Baumgarten F, Bastin JF, Sebald V, Reich PB, Liang J, Nabuurs GJ, ...

Late-spring frosts (LSFs) affect the performance of plants and animals across the world's temperate and boreal zones, but despite their ecological and economic impact on agriculture and forestr...

Article GUID: 32393624
Genetic structure and diversity of indigenous rice (Oryza sativa) varieties in the Eastern Himalayan region of Northeast India.

Author(s): Choudhury B, Khan ML, Dayanandan S

Springerplus. 2013 Dec;2(1):228 Authors: Choudhury B, Khan ML, Dayanandan S

Article GUID: 23741655
Functional androdioecy in critically endangered Gymnocladus assamicus (Leguminosae) in the Eastern Himalayan Region of Northeast India.

Author(s): Choudhury BI, Khan ML, Dayanandan S

PLoS One. 2014;9(2):e87287 Authors: Choudhury BI, Khan ML, Dayanandan S

Article GUID: 24586267
Patterns of nucleotide diversity and phenotypes of two domestication related genes (OsC1 and Wx) in indigenous rice varieties in Northeast India.

Author(s): Choudhury BI, Khan ML, Dayanandan S

BMC Genet. 2014 Jun 16;15:71 Authors: Choudhury BI, Khan ML, Dayanandan S

Article GUID: 24935343
Genetic relatedness among indigenous rice varieties in the Eastern Himalayan region based on nucleotide sequences of the Waxy gene.

Author(s): Choudhury BI, Khan ML, Dayanandan S

BMC Res Notes. 2014 Dec 29;7:953 Authors: Choudhury BI, Khan ML, Dayanandan S

Article GUID: 25547027
Title:Genetic relatedness among indigenous rice varieties in the Eastern Himalayan region based on nucleotide sequences of the Waxy gene.
Authors:Choudhury BI,  Khan ML,  Dayanandan S
Link:https://www.ncbi.nlm.nih.gov/pubmed/25547027?dopt=Abstract
DOI:10.1186/1756-0500-7-953
Category:BMC Res Notes
PMID:25547027
Dept Affiliation: GENOMICS
1 Biology Department, Forest and Evolutionary Genomics Laboratory, and Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke St, West, Montreal, Quebec H4B 1R6, Canada. baharulchoudhury@gmail.com.

Description:

Genetic relatedness among indigenous rice varieties in the Eastern Himalayan region based on nucleotide sequences of the Waxy gene.

BMC Res Notes. 2014 Dec 29;7:953

Authors: Choudhury BI, Khan ML, Dayanandan S

Abstract

BACKGROUND: Indigenous rice varieties in the Eastern Himalayan region of Northeast India are traditionally classified into sali, boro and jum ecotypes based on geographical locality and the season of cultivation. In this study, we used DNA sequence data from the Waxy (Wx) gene to infer the genetic relatedness among indigenous rice varieties in Northeast India and to assess the genetic distinctiveness of ecotypes.

FINDINGS: The results of all three analyses (Bayesian, Maximum Parsimony and Neighbor Joining) were congruent and revealed two genetically distinct clusters of rice varieties in the region. The large group comprised several varieties of sali and boro ecotypes, and all agronomically improved varieties. The small group consisted of only traditionally cultivated indigenous rice varieties, which included one boro, few sali and all jum varieties. The fixation index analysis revealed a very low level of differentiation between sali and boro (F(ST)?=?0.005), moderate differentiation between sali and jum (F(ST)?=?0.108) and high differentiation between jum and boro (F(ST)?=?0.230) ecotypes.

CONCLUSION: The genetic relatedness analyses revealed that sali, boro and jum ecotypes are genetically heterogeneous, and the current classification based on cultivation type is not congruent with the genetic background of rice varieties. Indigenous rice varieties chosen from genetically distinct clusters could be used in breeding programs to improve genetic gain through heterosis, while maintaining high genetic diversity.

PMID: 25547027 [PubMed - indexed for MEDLINE]