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|Authors:||Shinde, Jagdish Shrihari|
|Title:||EFFICACY OF GROWTH SUBSTANCES IN INDUCING MALE STERILITY IN SOME Vitis SPECIES|
|Publisher:||MAHATMA PHULE AGRICULTURAL UNIVERSITY RAHURI, 413 722 DIST- AHMEDNAGAR, Maharashtra State (India).|
|Abstract:||The present investigations entitled, "Efficacy of growth substances in inducing male sterility in some Vitis species" were undertaken after October, 1990 pruning in two varietiesviz. Black Round and Banglore Purple. Both the varietieswere growing in the Instructional-cura-Research Orchard of theDepartment of Horticulture, Mahatma Phule Agricultural University,Rahuri under uniform soil and vineyard management practices.In all, 14 treatments comprising three growth substancesviz. single application of MH, GA, NAA and double applicationsof MH with three concentrations under each and two controlsviz. Pure control (no treatment) and water spray control werereplicated thrice in a simple randomized block design.The observations on different parameters such as morphologicalchanges, palynological changes and other markedchanges as affected by different growth substances wererecorded. They included length of androecium and gynoecium,diameter of ovary, pollen sterility, pollen germination,length of pollen tube, fruit set, seed number and numberof ovules per ovary.The overall results indicated that 500 ppm MH, appliedtwice, once after 10-13 days of panicle emergence and onceapplied three days later, could be used to replace the conventional hand emasculation in both the varieties under study. This can make large scale hybridization work possible. It may, however,be cautioned that some fluctuations could beexpected depending upon the prevalent environmental onditions s well as the variety. Therefore, it appears necessary that the breeder employing this technique will have to initially screen the growth substances and their concentrations and standardize the method of their application in respect of each variety.|
|Appears in Collections:||Thesis|
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