These studies attribute the reduction in genetic diversity to a low number of pollen donors and a subsequent increase in geitonogamous
Self-compatibility resulting from geitonogamous
crosses was observed in Dorstenia arifolia, yet no fruit development by apomixis was observed (Table 1).
oleifera is a geitonogamous
and xenogamous diploid species (2n = 28; n = 14 chromosomes) whose gene pool and genetic base are expected to be wide with higher productivity [11, 12, 13, 14].
Consequences of floral complexity for bumblebee-mediated geitonogamous
self-pollination in Salvia nipponica Miq.
The clonal nature of eelgrass makes geitonogamous
selfing likely at finer scales, where a ramet may be in the presence of sister ramets, and the limited dispersal ability of sexual propagules makes escaping the spread of one's own genet uncertain [8, 9, 34].
This species has been reported as an inbreeder favoring geitonogamous
pollination (87% fruit set) compared with 53.33 percent fruit set under xenogamous conditions (Chauhan et al.
Although flowers with a wide availability of resources are heavily visited, many self-compatible species have a high degree of inbreeding caused by geitonogamous
pollination, apomixis, and also automatic self-pollination (BAWA, 1979).
From the orthogonal contrasts, flowers of autogamous racemes produced more seedless pods than geitonogamous
flowers (G = 5.1, P = 0.024), which in turn set more seedless pods than xenogamous racemes (G = 11.2, P = 0.001).
Nonetheless, individual pollen loads are usually below levels that provide higher probability of retention, and commonly observed geitonogamous
pollinations also appear to conflict with expected strong selection on moths to provide pollinations that give high retention probability.
For clonal species with SI systems, geitonogamous
pollination within genetically uniform patches causes a reduction in MA that hampers sexual reproduction (Thien et al.
nectar production is an adaptation to decrease geitonogamous
Comparing intact and emasculated flowers open on the same plant on the same day will underestimate autogamy, because emasculation of one flower potentially reduces the geitonogamous
pollen received by the other.