Paschos I, Natsis L, Nathanailides C, Kagalou I, Kolettas E (2001) Induction of gynogenesis and androgenesis
Petals were removed aseptically and anthers were carefully excised with forceps and placed on MS (Murashige and Skoog 1962) media modified with different auxins and cytokinin either alone or in combination for androgenesis
called as MSA media (Table 1).
The term androgenesis
was initially confined to a male-specific form of parthenogenesis by which an embryo is believed to originate from a fertilized egg where the female nucleus is somehow inactivated or eliminated (Fig.
Nonetheless, some breeding data suggest the occurrence of androgenesis
in Poecilia formosa.
Doubled haploid sunflower (Helianthus annuus) plant production by androgenesis
: fact or artifact.
Of all published studies on androgenesis
in interspecific and intergeneric hybrids of grasses, only one reported on successful regeneration of haploid green plants in L.
For example, in fish, gynogenesis, androgenesis
, or karyogamy may result from heterospecific insemination (Chevassus 1983).
type are influenced by factors such as genotype[3,4,6,8,10,17], pollen grain development of stage[2,3,6,8,9,13,18,19], medium composition [3,4,8,17], rate of growth regulators [3,4], illumination regimes[3,5,6] and physiological state of mother plant.
After GUHA & MAHESHAWARI (1966) discovered in vitro androgenesis
in cultured anthers of Datura innoxia, it become possible, in responsive crops, to obtain, in one step, fully homozygous lines, saving time and resources in breeding programs.
In vitro, following androgenesis
, plastids that originate in the microspore are responsible for the occurrence of albino plantlets in Poaceae.
This variation is common in androgenesis
in durum wheat and is a major problem for the application of haplodiploidisation in breeding programs of this species (Ghaemi and Sarrafi, 1994).
, the process by which pseudoembryos (embryoids) able to germinate into plants are produced from microspores (pollen embryogenesis), is of significant interest for developmental and genetic research as well as for plant breeding and biotechnology, since the process is a means for producing genetically true-breeding, doubled-haploid (DH) plants.