In maize, occurrence of haploid
plants in nature was described by Chase (1949, 1952) and found that spontaneous induction rate of haploids
was very low (1 out of 1000 seeds).
Microspore culture and the performance of microspore derived doubled haploid
in Brassica juncea L.
On the genetic improvement of androgenetic haploid
formation in Hordeum vulgare L.
As opposed to the low frequency reported for wild type maize plants (see above), Kermicle observed a high incidence (up to ~3%) of spontaneous male-derived, androgenic haploids
in a mutant inbred line carrying a mutant allele of the indeterminate gametophytel (ig1) gene.
lines from microspore and anther culture provide high potential for genetic breeding with development of genetic variation through production of completely homozygous lines in short time [3,4,10,9,14,17].
The production of haploid
wheat plants from wheat x maize crosses.
Aneuploids, and undetectable chromosome fragments in haploids
, may be an important reason for low viability of gynogens in fish (Thorgaard 1983, Ihssen et al.
possess a vegetative haploid
nuclear phase (Pfiester and Anderson, 1987; Coats, 2002).
Is the mite diploid, carrying two copies of a single chromosome, or haploid
, carrying one copy of a two-chromosome set?
A single ancestral haploid
cell of each clone was used to develop two populations composed of identical cells.
scabra): production of haploids
and doubled haploids
Production of haploids
in BG through anther culture would allow breeders for an efficient release of pure parental lines and better screening for resistance to diseases.