Viability of trisomics
, hyper-triploids, hypo-, and hypertetraploids was demonstrated previously in the Pacific oyster (Guo and Allen, 1994a).
To confirm this, a trisomic
analysis was performed.
The complete set of twenty primary trisomics
for soybean (2n = 40 + 1) were provided by T.
the complete set of primary trisomics
(2x + 1 = 41) has been difficult to establish because mitotic metaphase chromosomes are morphologically indistinguishable.
Palmer (1976) made an early attempt to develop primary trisomics
are a principal source of monosomics in plants (Singh, 1993).
1] plants involving T31 crosses with 14 other primary trisomics
had either 2n = 40 or 2n = 41 chromosomes, as expected.
, and other chromosome number variants for the group-1 chromosomes were observed.
In the near future, we anticipate the availability of all 20 primary trisomics
of soybean (Xu et al.
The extent of morphological variations observed in MAALs reported in this study could not be compared with the primary trisomics
of the soybean at this time because all the soybean primary trisomics
are in a heterozygous genetic background.
Chromosome location of two isozyme loci in Lolium perenne using primary trisomics
However, a low occurrence of primary trisomics
were observed (Table 2) as well as a single tetraploid.