STUDIES ON FUNCTIONAL MALE STEILITY IN TOMATO (Lycopersicon esculentum Mill.) AND ITS APPLICATION IN HYBRID SEED PRODUCTION
KrishiKosh
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Title |
STUDIES ON FUNCTIONAL MALE STEILITY IN TOMATO (Lycopersicon esculentum Mill.) AND ITS APPLICATION IN HYBRID SEED PRODUCTION
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Creator |
MANJUNATHA. C
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Contributor |
B.S. Tomar
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Subject |
sowing, fruits, developmental stages, sets, vegetables, land resources, germinability, crossing over, hybrids, productivity
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Description |
t-8158
Investigation entitled “Studies on functional male sterility in tomato (Lycopersicon ecsculentum Mill.) and its application in hybrid seed production” was conducted with the objectives for standardizing seed production technology in functional male sterile line “Pusa Divya” hybrid in plains and to asses the factors affecting pollen fertility, stigma receptivity, fruit and seed set and the quality of the seeds produced in two dates of sowing and under two environmental conditions viz. green house and open field. Different method and times of pollination and different seed extraction methods were investigated. Plant growth, fruit set, seed yield per fruit and seed quality were better in polyhouse compare to field. Fruit set and seed yield per fruit and seed quality were affected at both low and high temperature. Minimum temperature was critical as pollen viability and fruit set drastically reduced when night temperature was less than 110 C. The stigma became receptive and pollination was effective when mean temperature was 18-200 C in open field and 20-220 C in polyhouse. There was progressive decline in fruit set, seed yield per fruit and seed quality as the temperature increased and RH decreased. Optimum temperature for fruit set seed yield and seed quality is 19-200 c in field and 20-220 c in polyhouse. Fruit set, seed yield and seed quality were better at the start of crossing period compare to at the end of crossing period. More number of days available for crossing work in polyhouse compared to field. October 15th sowing provided maximum days for crossing work compare to November 15th sowing. Fruit maturity duration which affects the seed quality was more at the start of crossing period and less towards the end. Pollination at anthesis produced higher fruit and seed set. Stigma retained receptivity up to 4 4 days in field and upto 5 days in polyhouse. Pollination at 9:00 a.m and 5:00 a.m are best for higher fruit set and seed yield per fruit. Repeated pollination of same stigma produced higher fruit set and seed yield per fruit compared to once pollinated. Fruit set per cent was same when pollination was performed with freshly collected pollen, extracted pollen, one day ambient stored pollen and 8 day stored pollen at 40 c. Fermentation for 24 hr and HCl @ 10 ml/kg pulp for 30 minutes are the best for seed extraction in tomato. Functional male sterility system was stable in plains also as there were no selfed fruits during entire flowering period. |
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Date |
2016-12-23T10:03:19Z
2016-12-23T10:03:19Z 2009 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/92341
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Format |
application/pdf
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Publisher |
SEED SCIENCE AND TECHNOLOGY
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