Plants

Male Sterility in Flowering Plants by S. K. Jain

By S. K. Jain

or fruit creation as a result of the shortcoming of optimal pollination stipulations (CLARK and FRYER, 1920; ARMSTRONG and WHITE, 1935; VALLEAU, 1918; KVAALE, 1927; and plenty of others). with a view to mini­ mize the impression of bad pollen manufacturers, systematic making plans of a box planting or an orchard can be priceless. peculiarly, the im­ portant cause of its vast reputation is its strength use within the com­ mercial creation of hybrid seed. A male-sterile plant is an efficient girl for a crossing software and its employment renders the labori­ ous technique of emasculation superfluous. ]ONES and EMSWELLER (1937) and STEPHENS (1937) have been most likely the 1st to stipulate a scheme of its software in onion and sorghum respectively. despite the fact that convinced particular difficulties have restricted the practicability and for that reason a few of them can be pointed out in a later seetion (Section VIII). in recent years numerous makes an attempt were made to acquire a few chemie al strategy for the substitute induction of male sterility. notwithstanding, for a profitable method of the induction challenge an intensive understan­ ding of varied pathways that result in pollen abortion in certainly taking place instances, will be of serious price. it can be was hoping that information from those induction experiments alongwith the to be had biochemi­ cal analyses may result in the emergence and elucidation of priceless info of either theoretical and sensible interest.

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Aead. Sei. ) 37: 408-10. JONES, D. F. and P. C. MANGELSDORF, 1951. The production of hybrid seedcorn without detasseling. Conn. Agric. Exp. Sta. BuH. 550. JONES, D. , H. T. STINSON and U. -Transmissible variations in the cytoplasm within species of higher plants. Proc. Nat. Acad. Sci. ) 43: 598-602. J ONES, H. A. and A. E. CLARKE, 1943. Inheritance of male sterility in the onion and the production of hybrid seed. Proc. Amer. Soc. Hort. Sci. 43: 189-94. JONES, H. A. and G. N. DAVIS, 1944. Inbreeding and heterosisandtherelations to the development of new varieties of onion.

1932. Male sterility in Nieotiana. Proc. VI Int. Cong. Genet. Ithaca: 20. CLAASSEN, C. E. and A. HOFFMAN, 1950. The inheritance of pistillate character in castors and its possible utilization in the production of hybrid seed. Agron. J. 42: 79-82. CLARKE, A. E. and J. R. FRYER, 1930. Seed setting in alfalfa. Sci. Agric. 11: 138-43. CLARKE, A. E. and L. H. POLLARD, 1949. The amount of selfpollination in male sterile onion lines. Proc. Amer. Soc. Hort. Sci. 53: 299-301. CLARKE, F. , 1942. Cytological and genetic studies of sterility in inbred and hybrid maize.

The method of reproduetion in eommon Bahia grass, Paspalum notatum. J. Amer. Soe. Agron. 40: 443-52. BURTON, G. , 1958. Cytoplasmie male sterility in pearl millet (Pennisetum glaucum). Agron. Jour. 50: 230. CAMERON, D. R. and R. MOAv, 1957. Inheritanee in Nicotiana tabacum. XXVII. Pollenkiller, an alien genetie loeus indueing abortion of mierospores not earrying it. Geneties 42: 326-35. CHILDERS, W. , 1952. Male sterility in Medicago sativa. Sei. Agrie. 32: 351-64. CHITTENDEN, F. , 1914. The rogue wallflower.

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