A high frequency (19%) of deletions was detected compared to other chromosome aberrations such as monosomics, trisomics
and translocations (12% each).
Production and identification of primary trisomics
in diploid Agropyron cristatum (crested wheatgrass).
First, there is a prevalence of trisomics
(hyperploidy) over monosomics (hypoploidy) among spontaneous abortions and liveborns (Hecht and Hecht, 1987).
speltiodes, transfer of leaf rust resistance from Aegilops umbellulata to wheat, and use of balanced tertiary trisomics
for breeding barley hybrids are some of the elegant examples of the use of cytogenetics in plant breeding.
Saranac' alfalfa (Bingham, 1968) and trisomics
at the diploid (2n = 2x + 1 = 17) and tetraploid level are easily recovered following triploid x diploid and triploid x tetraploid crosses, respectively (Stanford, 1959; Kasha and McLennan, 1967; Buss and Cleveland, 1971; Binek and Bingham, 1970; and reviewed by McCoy and Bingham, 1988).
Studies on the trisomics
in rice plants (Oryza sativa L.
can be used to locate a gene on a particular chromosome, verify the independence of linkage groups, and associate linkage groups with individual chromosomes.
provide a way to associate genes and linkage groups with their respective chromosomes.
A large number of classical and molecular genes were associated with specific chromosomes in these crops by either modification of genetic ratios or dosage effects from extra chromosomes in primary trisomics
Recently, we identified two monosomics among progenies of soybean primary trisomics
(2n = 41).
Chromosomal location of fertility restoring genes for `wild abortive' cytoplasmic male sterility using primary trisomics
Therefore, the triploids from ms1ms1 soybean have not become useful sources for generating primary trisomics
(2n = 2x + 1 = 41) in soybean.