scholarly journals Elementary apomictic processes in Rubus L.

2014 ◽  
Vol 50 (1-2) ◽  
pp. 201-204 ◽  
Author(s):  
Roman Czapik

Two elementary apomictic processe were found in the examined <em>Rubus</em> species: <em>R. saxatilis</em> developed diplosporous and aposporous embryo sacs, <em>R. caesius</em> - displosporous, apart from meiotic ones. These result; confirmed the wide occurrence of facultative apomixis and intraspecific differentiation of the mode of reproduction within the taxa of the investigated genus.

Author(s):  
Aline E. Casaril ◽  
Carlos G. Santos ◽  
Bruno S. Marangoni ◽  
Sandro M. Lima ◽  
Luis H.C. Andrade ◽  
...  

2017 ◽  
Vol 7 (1) ◽  
pp. 14-20 ◽  
Author(s):  
M. N. Shapturenko ◽  
T. V. Pechkovskaya ◽  
S. I. Vakula ◽  
A. V. Jakimovich ◽  
Yu. M. Zabara ◽  
...  

Twin Research ◽  
2000 ◽  
Vol 3 (3) ◽  
pp. 142-147 ◽  
Author(s):  
EA Stewart

AbstractIn both traditional and modern societies, twinship, as an unusual mode of reproduction, involves difficulties for social systems in maintaining consistent classification systems. It is proposed that the most prevalent response to twinship involves various ‘strategies of normalisation’ to defuse and contain the potential disruption. This proposition is illustrated and analysed in relation to ethnographic maternal drawn mainly (but not exclusively) from African communities in the twentieth century. Following a discussion of twin infanticide as the most extreme of the normalising strategies, the article concludes by identifying a number of paradoxes in the social construction of twinship. Twin Research (2000) 3, 142–147.


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