A comparison of physical distribution of recombination in chromosome 1R in diploid rye and in hexaploid triticale

1992 ◽  
Vol 83 (8) ◽  
pp. 1048-1053 ◽  
Author(s):  
A. J. Lukaszewski
1972 ◽  
Vol 52 (4) ◽  
pp. 569-574 ◽  
Author(s):  
K. C. YEUNG ◽  
E. N. LARTER

A study of the pollen production properties of three hexaploid triticale strains (Triticale hexaploide Lart.) showed that their anther length was significantly greater than that of wheat anthers (Triticum aestivum L. em Thell.) and the estimated number of pollen grains per anther ranged from 15,000 to 21,000. In comparison, a total of 8000 grains per anther was estimated for wheat, cult Manitou. Eighty-nine percent anther extrusion occurred in triticale cult Rosner, while Manitou averaged 70% anther extrusion. The period of anthesis of triticale varied according to strain but generally was of longer duration than in Manitou and thereby promoted outcrossing. Using a triticale strain carrying a dominant marker gene, 50% seed-set was obtained at a distance of 12 m leeward of the pollen source; however, a small percentage was still obtained at a distance of 30 m. It would appear from the limited number of triticales used in this study that a wide range of variability exists within this species in its pollen production and disseminating properties. With appropriate selection pressures, strains with an outbreeding habit could be developed for the purpose of hybrid seed production.


Author(s):  
Obioma R. Nwaogbe ◽  
Victor Omoke ◽  
Emmanuel C. Ubani ◽  
Sunday I. Ukaegbu

The objective of this study was to determine the optimal allocation of shipments (least cost) of two manufactured products between depots and places of consumption. In this study, the least-cost method was used in solving the transportation algorithm using Tora 2.0 version software. The study was necessary because of the high operating costs associated with physical distribution when deliveries are not properly planned and considered with reference to alternative strategies. In contrast, significant savings can be achieved by using techniques available for determining the cheapest methods of transporting goods from several origins to several destinations. Cost minimisation is a very useful approach to the solution of transportation problems.


2007 ◽  
Vol 43 (3) ◽  
pp. 281-286 ◽  
Author(s):  
O. A. Orlovskaya ◽  
L. N. Kaminskaya ◽  
L. V. Khotyleva

1969 ◽  
Vol 6 (3) ◽  
pp. 279 ◽  
Author(s):  
Ronald P. Willett ◽  
P. Ronald Stephenson

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