volume 25 issue 3 (september 2005) : 157 - 161
POLLEN VIABILITY AND MEIOTIC STUDIES IN MUSKMELON (CUCUMIS MELD L.)*
1Department of Genetics and Plant Breeding.
Regional Agricultural Research Station. Tirupati - 517502. India
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Agricultural Science Digest
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volume 25 issue 3 (september 2005) : 157 - 161
POLLEN VIABILITY AND MEIOTIC STUDIES IN MUSKMELON (CUCUMIS MELD L.)*
1Department of Genetics and Plant Breeding.
Regional Agricultural Research Station. Tirupati - 517502. India
ABSTRACT
Among the cucurbits Cucumis melo is a broad polymorphic group comprising of vegetable as well as dessert types differing in morphological and physiological features of the fruit. Pollen viability was studied in parents and hybrids. The pollen viability ranged from 93% (Cucumis melo white elongated slightly ridged type) to 98% (Cucumis melo No. 13 green elongated type). In hybrids it ranged from 91% (Cucumis melo vegetabe type No. 29 X Cucumis melo white elongated type) to 96% (Cucumls melo vegetabe type No. 29 X netted dessert type). Meiosis was studied in Cucumis melo vegetabe type No. 29 X netted dessert type, as these hybrid appeared more promising for the development of dessert type line with good keeping quality, lack of ridges and disease resistance. Study of diakinesis and metaphases have shown the formation of twelve bivalents with no occurrence of univalents. There was a range of 8–10 ring bivalents and 2–4 rod bivalents. The non occurrence of univalents clearly shows that there is sufficient homology between the chromosomes of these hybrid and chiasma frequency in these hybrid is 20.4 per cell. The progeny of these hybrid is being planned to be grown for the selection of desirable gene combinations.
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REFERENCES
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In this Article
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Published In
Agricultural Science Digest