bloosom biology and hybidizati tech in sapota
TRANSCRIPT
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ASSIGNMENT ON
Blossom biology and Hybridization technique in Sapota
Presented
By
Mr Manas Kumar Patel
(01Fsc/2014)
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TAXONOMICAL CLASSIFICATION OF SAPOTA
B.N:-Achras sapotaFamily:-Sapotaceae2n:-2x=26O.P:-Tropical America
Closest genus belong to same familyCommon Name Scientific Name
Black Sapota Diospyrous digyra
Green sapota Calocarpum viride
Mammey Sapota Pouteria sapota
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OBJECTIVE OF BREEDING
Dwarf structure of tree.Precocity in bearing.Synchronized flowering.High yield & good keeping quality.Less seeded fruit with less latex.Thick skinned, hard flesh with sandy and gritty texture low Resistance against leaf spot
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MORPHOLOGY OF FLOWER• The flowers (about 1 cm in diameter) are solitary and pedunlous on
short pedicels (1-2 cm ) and are carried in the leaf axils of terminal leaf clusters.
• Calyx, consist of 6 sepals is arranged in 2 whorls of 3 sepals. Each slighted connected at the base (gamopetalous).
• The outer sepals are brownish in colour.
• Corolla is consist of 6 pale white petals , which form a bell shaped tube.
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(Fig:-stages of growth in Sapota flower)
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ANTHER OF SAPOTA• Androecium consist of 12 stamen
arranged in two whorls of 6 each (6 petaloid stamenoids and 9 stamens) on the rim of the corolla tube (epipetalous).
• The filaments of stamens are short and dorsified. Anther are small and pointed towards tip and dithecus.
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PISTILATE FLOWER
• Pistle is syncarpous and composed of 4-5 fused carpels.
• There is one anthrocarpous ovule in each locule, which is arranged in axile placentation.
• The style is long green and stigma is capitate.
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FLORAL BIOLOGY OF SAPOTA
• Flower type:-protogyny stigma grow out of the bud about 2 days before anthesis.• Anthesis time:- 4-4.30 pm• Dehiscence time:-8-10 pm• Peak receptivity time:-8-10 am• Stigma receptivity 2 days before opening and continues upto 12
hrs after opening.• Time taken fruit to maturity:-10-12 months(north india) 4-5 months(south india)
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HYBRIDIZATION METHOD OF SAPOTA1)Emasculation Procedure:-making a in circular incision around the flower bud with a sharp knife or blade, so that 2/3 of the upper floral cup is removed including a portion of calyx, corolla & epipetalous stamen.
2)Bagging before 4-5 pm (stigma protrudes out of the bud)
3)Style left in position in remaining 1/3 of the floral cup.
4)Pollination:-done in early of the days which collect in previous day and collect in Petridis.
5) Rebagging
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ACHIVMENTS IN SAPOTA:-
• CO-1:-Cricket Ball x Oval• CO-3:-Cricket ball x Vavivalasa• PKM-2:-Guthi x Kirti Bharati• PKM-3:- Guthi x Cricket Ball• DSH-1:-Kalipatti x cricket ball• DSH-2:-Kalipatti x cricket ball
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