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Characterization and gene mapping of a chlorophyll-deficient mutant clm1 of Triticum monococcum L. |
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| Authors: | M J Ansari A Al-Ghamdi R Kumar S Usmani Y Al-Attal A Nuru A A Mohamed K Singh H S Dhaliwal |
| Institution: | 1307. Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, PO Box 2460, Riyadh, 11451, KSA 6307. Department of Biotechnology, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India 2307. Department of Biotechnology, ICFAI University, Dehradun, 248197, India 3307. D.K.M. College for Women, Thiruvalluvar University, Vellore, Tamilnadu, 632004, India 4307. School of Agricultural Biotechnology, Punjab Agricultural University, Ludhiana, Punjab, 141004, India 5307. Akal School of Biotechnology, Eternal University, Baru Sahib, Himachal Pradesh, 173101, India |
| Abstract: | Diploid wheat Triticum monococcum L. is a model plant for wheat functional genomics. Chlorophyll-deficient mutant (clm1) was identified during manual screening of the ethyl methanesulphonate (EMS)-treated M2 progenies of T. monococcum accession pau14087 in the field. The clm1 mutant, due to significantly decreased chlorophyll content compared with the wild-type (WT), exhibited pale yellow leaves which slowly recovered to green before flowering. The clm1 mutant showed early flowering, reduced number of tillers, trichome length and density, and different shape as compared with the WT. At the same time, clm1 mutant culm had more chlorophyll-containing parenchymatous tissues compared to WT, presumably to absorb more sunlight for photosynthesis. Genetic analysis indicated that the clm1 mutation was monogenic recessive. The clm1 mutant was mapped between Xgwm473 and Xwmc96 SSR markers, with genetic distances of 2.1 and 2.6 cM, respectively, on the 7AmL chromosome. |
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