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By S. K. Jain

or fruit construction on account of the shortcoming of optimal pollination stipulations (CLARK and FRYER, 1920; ARMSTRONG and WHITE, 1935; VALLEAU, 1918; KVAALE, 1927; and lots of others). with a purpose to mini­ mize the impact of negative pollen manufacturers, systematic making plans of a box planting or an orchard can be helpful. primarily, the im­ portant reason behind its huge recognition is its power use within the com­ mercial construction of hybrid seed. A male-sterile plant is an efficient lady for a crossing application and its employment renders the labori­ ous approach of emasculation superfluous. ]ONES and EMSWELLER (1937) and STEPHENS (1937) have been most likely the 1st to stipulate a scheme of its program in onion and sorghum respectively. even if sure particular difficulties have restricted the practicability and consequently a few of them should be pointed out in a later seetion (Section VIII). in recent times a number of makes an attempt were made to procure a few chemie al process for the synthetic induction of male sterility. despite the fact that, for a profitable method of the induction challenge an intensive understan­ ding of varied pathways that lead to pollen abortion in obviously happening circumstances, will be of serious worth. it can be was hoping that facts from those induction experiments alongwith the to be had biochemi­ cal analyses may result in the emergence and elucidation of worthwhile info of either theoretical and useful interest.

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