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Advisor: Masalkar, Dr.S.D
Desai, Dr.U.T
Sonone, Dr.A.H
Kulkarni, Dr.S.S
Publisher: Mahatma Phule Krishi Vidyapeeth, Rahuri-413 722 (M.S.), India.
Language: en
Type: Thesis
Agrotags: null
Abstract: The present investigations entitled, "Evaluation of Annona (Annona spp.) Hybrids" was carried out at the Instructional-cum-Research Orchard, Department of Horticulture, Mahatma Phule Krishi Vidyapeeth, Rahuri during 2006 and 2007. In all, 24 hybrids, having different parents were evaluated. Growth and yield parameters, physico-chemical aspects and genetic parameters were key factors for the evaluation. The results revealed a great variability for various characters which helped to identify the most promising hybrids. The plants exhibited erect, semi-erect, semi-spreading and spreading growth habit. The tree form observed was well composed, poorly composed and irregular. The plant height varied from 2.22 to 3.40 m, North-South spread ranged from 1.45 to 2.28 m while East-West spread varied from 1.24 to 2.30 m. The tree volume ranged from 4.10 to 15.95 m3. The growth parameters showed that the Hybrid No. 5, Hybrid No. 4 and Hybrid No. 22 were vigorous. The nature of foliage was either evergreen, semi-deciduous or deciduous. The leaf exhibited three different colours as dark green, spinach green and deep green. While leaf shape observed was oblong, oblong lanceolate and elliptical. The leaf length ranged from 11.48 to 17.25 cm and leaf breadth from 3.35 to 8.34 cm. The time of flower initiation varied from IInd week of April to IIIrd week of May. The fruit set percentage varied from 1.58 to 2.96, while the period of maturity ranged from 137.50 to 155.00 days. The number of fruits per plant varied from 22.5 to 88.25, while the yield ranged between 7.75 to 16.91 kg per plant. The fruit surface was rough in 16 hybrids while it was smooth in 8 hybrids. The fruit colour was observed as yellowish green, whitish green and dark green. The shape of fruit observed was either irregular, round or oval. The shape of aerole was categorized as flat, pointed, square, mammal, hexagonal, round and spiny. The pulp colour was either milky white, creamy white or yellowish white. The pulp texture was recorded as soft, juicy and granular. The colour of inner surface of rind was either pink, yellow or white. There was variation for fruit characters in hybrids. The fruit physical characters viz., fruit length (5.53 to 10.15 cm), fruit breadth (6.30 to 9.73 cm), number of seeds per fruit (18.00 to 26.75), seed weight (20.63 to 38.29 g), seed percentage (6.72 to 11.79%), rind weight (75.34 to 179.40 g), rind percentage (33.83 to 42.59%), pulp weight (99.61 to 313.30 g) and pulp percentage (46.48 to 58.96%) showed significant variation. The chemical characters viz., TSS (20.25 to 26.45°Brix), acidity (0.21 to 0.25%), TSS:acidity ratio (82.91 to 113.15), total sugars (16.21 to 24.50%), reducing sugars (13.73 to 21.64%) and non-reducing sugars (1.96 to 2.86%) also showed variation Regarding the genetic parameters, the phenotypic coefficient of variation (PCV) was greater than genotypic coefficient of variation (GCV). The heritability was higher for fruit weight, number of fruits per plant while lower for acidity and number of seeds per fruit. The genetic advance was high for average fruit weight, yield per plant, number of fruits per tree and tree volume while low for days to maturity, rind percentage, pulp percentage and acidity. The average fruit weight had positive correlation with pulp, rind and seed percentage. The fruit set percentage was positively correlated with yield per plant and plant height. The number of seeds per fruit was negatively correlated with almost all parameters except average fruit weight and days to maturity. Taking into consideration the overall performance of hybrids, the Hybrid No. 13, Hybrid No. 20, Hybrid No. 22 and Hybrid No. 6 were superior to all other hybrids. These four promising hybrids were top in fruit quality traits and could be commercially viable cultivars.
Subject: Horticulture
Theme: Horticulture
These Type: Ph.D
Issue Date: 2008-06-04
Appears in Collections:Thesis

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