ASSESSMENT OF KAGHZI LIME [Citrus aurantifolia, Swingle] SELECTIONS FOR YIELD AND QUALITY
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Date
1993-08-04
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MAHATMA PHULE KRISHI VIDYAPEETH RAHURI, 418 722 DIST.- AHMEDNAGAR, Maharashtra State (India)
Abstract
The present investigation was carried out at instructional-cum-Research Orchard, Department of: Horticulture, MPKV, Rahuri for two years viz., 1991 and 1992. in all 57 selections, collected by the Ad-hoc Project on Kaghsi lime Improvement and planted on University farm under identical conditions, were evaluated. The results revealed a great variability in respect of various characters Tree form was either well composed or semi-drooping or irregular, fruit shapes observed were round, oblong or in between these two. The fruit surface was either smooth, semi-smooth and rough. Growth characters viz ., leaf length (4.74 to 6.1 cm), leaf breadth (2.23 to 3.74 cm), thorns/ 30 cm twig (17.74.to 27.30), plant spread (1.63 to 2.94 m), 3 plant height (1.50 to 2.55 m), tree volume (2.02 to 11.2 m ) and stem girth (16.5 to 32.25 cm); yield characters viz., precocity of bearing (29 to 53 months, flowers/twig (1.59 to 10.88), fruits/plant (36 to 434) and yield per plant (0.92 to 2.1.40 kg); fruit characters viz., fruit length (3.55 to 4.02 cm), fruit diameter (3.27 to 4.6 cm), fruit weight (27.16 to 49.75 g) , fruit volume (30.68 to 4 6.77 ml), fruit density (0.79 to 1.08), rind thickness (1.52 to 2.22 mm), seeds/fruit (5.54 to 11.15), juice content (33.62 to 57.19%), TSS (6.25 to 8.1%), acidity (5.25 to 7.27), pH of juice (1.69 to 2.21) and vitamin c (20.08 to 28.5 mg/100 ml) also revealed a great variability. For growth Sel.107, 124, 127, 49, 111, 126, 113, 121, 122 and 120 and for yield Sel.49, 107, 124, 138, 159, 122 and 125 were the best. Considering all fruit quality characters the Sel .49, 159, 91 and 127 were the most promising. For higher summer cropping Sel.159, 107, 124, 188, 182 and Sel.131 were most promising. Based on screening under field and with artificial inoculation Sel.122, 124, 127, 159 and 240 were bettor Cor canker while Sel.96, 121, 159, 56, 89,and 95 were best for tristeza. Estimates of genetic parameters indicated higher values of GCV and PCV for yield per plant, fruits per plant, flowers per twig and tree volume. Heritability was higher for fruits per plant, yield per plant, average fruit weight, fruit volume and juice percentage. The genetic advance as percentage of mean was highest for fruits per plant, yield per plant, tree volume and flowers per twig and lowest for rind thickness, Growth characters were positively associated among themselves and also with most of the yield and fruit quality characters. Fruits/plant and yield were also positivelycorrelated with most of the fruit quality attributes. TSS was positively correlated with acidity and juice content. Juice content was positively associated with TSS and negatively correlated with rind thickness. Average fruit weight showed direct effect on yield. Taking into consideration growth performance, yield attributes, fruit quality and reaction to canker, tristeza and leaf miner Sel.49, 121, 122, 124 and 159 were the best.
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