Volume 7, Issue 4, August 2019, Page: 76-85
Screening of Chilli (Capsicum annum L.) Genotypes for Drought Tolerant at Seedling Emergence Stage
Md. Rezwan Molla, Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh
Iftekhar Ahmed, Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh
Rumman Ara, Regional Spices Research Centre, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh
Lutful Hassan, Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh
Md. Motiar Rohman, Molecular Breeding Laboratory, Plant Breeding Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh
Received: Jul. 15, 2019;       Accepted: Aug. 16, 2019;       Published: Aug. 28, 2019
DOI: 10.11648/j.jps.20190704.12      View  101      Downloads  53
Abstract
Forty seven chilli (Capsicum annum L.) genotypes were evaluated for their genetic potential to drought tolerant at germination stage using 12.5% polyethylene (PEG, MW6000). Relative germination energy (RGE), relative germination rate (RGR), relative germination index (RGI), relative vitality index (RVI) and their relative PEG injury rate were computed to identify the most tolerant genotypes on germination stage. Significant differences were observed among the genotypes, treatments and their interactions for evaluated traits suggesting a great amount of variability for drought tolerant in chilli. Based on aggregated score of RGE, RGR, RGI and RVI parameters BD-10906, BD-10912, BD-10911, BD-10916 and BD-10913 were the top five genotypes, whereas BD-10902, RT-20, AM-29, BD-10893 and BD-10930 lowermost five genotypes in the rank of drought tolerant which is an indication of their tolerant and susceptible to drought stress. The lowest relative PEG injury rate was observed in tolerant genotypes, contrary the highest rate was recorded in susceptible genotypes. Dendrogram using Agglomerative Clustering Method grouped the 47 genotypes into four different clusters at the 0.668 co-phenetic correlation coefficient. Drought tolerant chilli genotypes grouped in cluster I, while the susceptible genotypes clustered together in group III and IV and a number of moderate tolerant genotypes gathered in cluster II. Consequently the maximum mean values of tested parameters viz. RGR (91.30), RGE (30.43), RGI (40.58) and RVI (54.10) were observed in clusters I. Positive and significant correlation values were observed between the tolerant indications parameters. RGI showed comparatively strong and positive correlation with all tested parameters. Thus, tolerant and susceptible genotypes will be progressed for further tolerant study in seedling stage.
Keywords
Chilli (Capsicum annum L.), Drought, Germination, Tolerance Indices, Relative Injury Rate, Polyethylene Glycol
To cite this article
Md. Rezwan Molla, Iftekhar Ahmed, Rumman Ara, Lutful Hassan, Md. Motiar Rohman, Screening of Chilli (Capsicum annum L.) Genotypes for Drought Tolerant at Seedling Emergence Stage, Journal of Plant Sciences. Vol. 7, No. 4, 2019, pp. 76-85. doi: 10.11648/j.jps.20190704.12
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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