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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Jul 2018, 39 (4)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Diversity assessment in Abelmoschus tuberculatus : A DIVA-GIS study

 

D. Chand1*, N. Dikshit1, N. Sivaraj2, S.S. Gomashe1 and M.A. Nizar1

1ICAR-National Bureau of Plant Genetic Resources, Regional Station, Dr. PDKV Campus, Akola-444 104, India

2ICAR-National Bureau of Plant Genetic Resources, Regional Station, Rajendranagar, Hyderabad-500 030, India

*Corresponding Author E-mail: nbpgrakl@yahoo.com

 

 

 

Key words

Biotic stress tolerance

DIVA-GIS

Genetic Diversity

Resistance sources

Wild Okra

 

 

 

Publication Data

Paper received : 23.12.2016

Revised received : 26.08.2017

Re-revised received : 04.11.2017

Accepted : 02.12.2017  

 

Abstract

Aim: Variability in Abelmoschus tuberculatus Pal & Singh from North Western, Central Indian and its adjoining regions has not been studied for agro-morphological traits. Considering the importance of this wild species as a donor for desirable traits, the study was carried out to assess the diversity for increasing its utilization in okra breeding programmes.   

 

Methodology: Fifty eight accessions of wild okra were grown in an augmented block design during the kharif seasons of 2014-15 and 2015-2016 at Akola, India. Nine qualitative and ten quantitative traits were recorded. Data-Interpolating Variational Analysis-Geographic Information System (DIVA – GIS) version 7.5 and SAS Enterprise Guide 4.3 were used for diversity and statistical analyses, respectively. 

 

Results: Significant variability was observed in qualitative and quantitative traits. High coefficient of variation was observed in fruits per plant (52.56 %) followed by  first fruit producing node (46.03%), first flowering node (43.8%) and number of seeds per fruit (38.82) suggesting existence of diversity for these traits. Dendrogram (Wards method) articulated two clusters comprising 21 and 37 genotypes, respectively. DIVA-GIS grid maps generated for diversity analysis in A. tuberculatus indicated that the Central Indian region was diversity rich pocket. Shannon diversity index and coefficient of variation values for plant height, days to maturity, number of fruits per plant, fruit length, number of seeds per fruit and 100 seed weight indicated Central region of Maharashtra as potential region for diversity of these traits.        

 

Interpretation: DIVA-GIS analysis revealed that Central Maharashtra, Gujarat and Madhya Pradesh, are diversity rich pockets for wild okra (A. tuberculatus) germplasm in fruit traits. The desirable traits viz., resistances to pest and diseases identified in A. tuberculatus may be worth introducing into the cultivated species in future okra improvement programmes

 

 

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