ISSN: 0973-7510

E-ISSN: 2581-690X

Prafull Kumar1 , S.K. Dhillon2, Abhinav Sao1, A.K. Thakur1, Poonam Kumari1, R.R. Kanwar1 and R.K. Patel1
1S. G. College of Agriculture and Research Station, Jagdalpur, CG, India.
2Punjab Agricultural University, Ludhiana, Punjab, India.
J. Pure Appl. Microbiol., 2016, 10 (3): 2019-2033
© The Author(s). 2016
Received: 26/02/2016 | Accepted: 16/04/2016 | Published: 30/09/2016
Abstract

The experiment was undertaken in three water stress environments to assess the inherent diversity of the primary gene pool of sunflower (Helianthus annuus L.) following morphophysiological criteria and thereafter validation of these genotypes in the current trend of climate change. Plot achene yield was maximum in control and ranged from 10.3g to 54.7g in W1, 7.2 to 52.2 in W2, 9.7 to 49.8 in W3 and 10.0 to 51.8 in W4.The genotypes P-94-R, P-115-R and P-119-R were found to be severely affected by the treatments, however, 95-C-1-R and P-87-R resisted to water stress and showed minimum reduction in seed yield. D2 statistics grouped the test genotypes into 6 clusters. Cluster I comprised of maximum number of genotypes (27 genotypes), followed by cluster II (5 genotypes), cluster III and V (3 genotypes in each), cluster IV (2 genotypes), and cluster VI (1 genotypes). Among the traits evaluated, leaf area index contributed the maximum (18.54%) towards the observed diversity, followed by early vigour (18.35%), oil content (12.35%), 100 seed weight (10.59), photosynthetic capacity (9.58%), and plant height (9.29%), and leaf water potential (6.16%), achene yield per plant (4.50%), head diameter (4.19%) and canopy temperature (3.16%). Genotypes P69R, P87R, P93R, P115R, NDLR2 (Cluster I), P107RP1 (Cluster II), P121R (Cluster III), P111R (Cluster IV), 40B and 50B (Cluster V) and 7-1B (Cluster VI) identified as stress tolerant genotypes. The study concludes cytoplasmic restorer lines P111R, P112R and P110R and maintainer lines 71B, 40B and 50B as putative genetic material to comply threatening climatic phenomenon.

Keywords

Changing climate, Genotypic diversity, Water stress, Food security.

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© The Author(s) 2016. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.