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Crop Improvement
Year : 2010, Volume : 37, Issue : 2
First page : ( 210) Last page : ( 210)
Print ISSN : 0256-0933. Online ISSN : 2231-4563.

Effect of Genotypes on Relationship of Leaf Yield and Lawsone Content with Rainfall in Henna of Leaf Yield and Lawsone Content with Rainfall in Henna

Jindal S. K., Patel Nisha

Central Arid Zone Research Institute, Jodhpur-342003. jindal53@yahoo.co.in

Abstract

Henna (Lawsonia inermis Linn.) one of the promising dye yielding crops is grown in more than thirty thousand hectares in Pali district of Rajasthan, constituting more than 90% area under cultivation in India. Till 2000 no work was done on the improvement in this crop for higher leaf yield. In 2001, arid and semi-arid areas of Gujarat and Rajasthan were explored and cuttings from individual 20 shrubs with higher foliage, dark green and large leaves free from insect pests and diseases were collected from 20 different sites. The cuttings were rooted, and the clones were transplanted in a single- row- plot of 3 m length accommodating 6 plants per row in randomized complete block design with three replications during August 2001. Data were recorded for dry leaf weight on three randomly selected plants from each plot for seven years during 2002–2009 and lawsone content was estimated. There were significant differences among the clones, environments and genotype - environment interaction. Rainfall was 50.6 (2002), 418.7 (2003). 220.4 (2004), 283.0 (2005), 270.6 (2006), 323.6 (2007) and 212.0 mm (2009). Average leaf yield per plant per year was 39.4 g, and it was maximum 72.6 g in 2004 and minimum 12.0 g in 2009. Only six genotypes showed more than 25% more leaf yield than the grand mean. Khedbrahm was the highest leaf yielder per plant (69.8 g) followed by Pali (60.6 g), Panchotiya (52.0 g) and Malav (51.6 g). The relationship of mean leaf yield with coefficient of variation was negative but it was non significant. Coefficient of variation was more than 40% in most of the genotypes and high yielding genotypes were in this category. Relationships of leaf yield with annual rainfall were positive in all the genotypes except genotypes Anand and Malpur. Variation in leaf yield due to rains was in the range of 0% (Ajmer) to 37.8% (Jodhpur) and on an average only 5.5% variation in leaf yield was due to rains. Variation attributable to the rains was more than 20% in genotypes Jodhpur and Kothara and in other genotypes variation due to rains was less. In case of lawsone content the grand mean was 1.42% of the dry leaf weight and it was minimum 1.07 in 2002 and 2007, and maximum 1.98% in 2003. The mean lawsone content varied from 1.13% for Sarotra to 1.82% for Ajmer and this was the only genotype that showed more than 25% lawsone than the grand mean. Coefficient of variation was mostly less than 30% and it was minimum in genotype Jodhpur and maximum in Anand. There was more uniformity in lawsone content than the leaf yield over different years. The relationship of lawsone content with the rainfall was positive in all the genotypes and it was significant only in the case of genotype Jadia. Maximum variation in the lawsone content due to the rainfall was in Jadia followed by Anand. In all the genotypes variation due to rainfall in lawsone content was more than the variation in leaf yield. In the desert where rains are erratic, the high yielding genotypes at the cost of stability cannot be ignored. So the high yielding genotypes i. e. Khedbrahm, Pali, Malav and Panchotiya can be grown in larger areas.

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Keywords

Henna, genotypes, leaf yield, lawsone content.

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