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Pak. J. Bot., 47(6): 2347-2354, 2015. |
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Updated: 02-01-16 | ||||
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CHARACTERIZATION OF INDIGENOUS GOSSYPIUM ARBOREUM L. GENOTYPES FOR VARIOUS FIBER QUALITY TRAITS
MUHAMMAD ATIF IQBAL1,2, AMMAD ABBAS1,2, YUSUF ZAFAR3 AND MEHBOOB-UR-RAHMAN1,2*
1Plant Genomics & Molecular Breeding (PGMB) Lab, National Institute for Biotechnology & Genetic Engineering (NIBGE), PO Box 577, Jhang Road Faisalabad Pakistan 2Pakistan Institute of Engineering & Applied Sciences (PIEAS), Nilore-45650, Islamabad Pakistan 3Minister (Technical), Permanent Mission of Pakistan to the IAEA Hofzeile 13, A-1190 Vienna – Austria *Corresponding author e-mail: mehboob_pbd@yahoo.com or mehboob@nibge.org
Abstract: Diploid cotton (Gossypium arboreum L.) being an “Old World” cultivated cotton species, evolved in Indo-Pak subcontinent, has been known for conferring resistance to biotic and abiotic stresses. To the extent of our knowledge, there is no comprehensive report available on the characterization of G. arboreum germplasm. Hence, the present study was conducted to characterize 26 G. arboreum genotypes by deploying univariate and multivariate analysis in 2010 at NIBGE, Faisalabad. All these genotypes were characterized for boll weight, GOT percentage, micronaire value, staple length, fiber bundle strength and uniformity index. Genotypic variation was significant (p<0.01) for all the analyzed traits except boll weight. Maximum boll weight (2.47g) was observed for genotype 23718. GOT ranged from 18.75% (Haroonabad) to 36.94% (DC-116).The finest fiber was obtained from synthetic (4.37 µg/inch) and this genotype also exhibited the higher values for staple length (23.81 mm) and fiber bundle strength (27.37 g/tex). Range for uniformity index was observed from 76.19% (Garohill) to 77.98% (212). Principal component analysis (PCA) exhibited that first five components accounted for >63% of the total variability. Cluster analysis identified four groups based on their agronomic properties. Significant relationships among different traits can be useful to select best genotypes having good fiber quality traits. These genotypes may prove a valuable resource to fuel the breeding efforts for not only broadening the genetic base of the newly developed material but can also add synergy to various cotton genomic projects.
Key words: Diploid cotton, Gossypium arobreum L., Characterization, GOT percentage, Fiber quality.
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