ISSN:
1432-2145
Keywords:
Key words Pollen selection
;
Pollen selection models
;
Pollen/style interactions
;
Pollen/pollen interactions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A series of studies, recently reviewed, has established that approximately 60% of the structural genes which are expressed in the sporophytic portion of the angiosperm life cycle are also expressed and exposed to selection in the pollen. Given the haploidy and large population sizes of pollen grains, a substantial portion of the sporophytic genome could thus be periodically exposed to a bacterial type of mass screening. This extraordinary possibility is often subject to some skepticism which may, of course, be justified. However, recent attempts to apply models appear to be inappropriate in this context, in part because these attempts overlook an important source of genetic variation, and also because they assume fixed values for selection and fitness. More recently, studies of pollen/pollen interactions have suggested that what Linskens termed the ”programic phase” may represent an arena for important, and largely unexplored phenomena, some of which are discussed here.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004970050055
Permalink
