Compensating ability in pollen fertilization between group-6 and -7 homoeologous chromosomes of barley and wheat.
By using alpha-amylase isozymes as markers for chromosomes of homoeologous groups 6 and 7, we analyzed the segregation of chromosome constitution in the progenies from crosses between double-ditelosomic or ditelosomic lines of hexaploid wheat cultivar 'Chinese Spring' (CS) as the female parent and double-monosomic F1 hybrids of CS x wheat-barley substitution lines for barley chromosomes 6H or 7H. From this analysis we estimated the transmission rate via pollen of barley chromosomes 6H and 7H in the double-monosomics and evaluated the compensating ability between barley and wheat chromosomes in homoeologous groups 6 and 7. The results indicated that both 6H and 7H showed their highest compensating ability for their respective homoeologous wheat chromosomes 6A (37.5% transmission rate) and 7A (39.4%), intermediate for 6D (34.1%) and 7D (29.6%), and lowest for 6B (26.6%) and 7B (22.6%) chromosomes.
Faculty of Agriculture, Gifu University, Japan.
Y F
YF
Yang
Y
Y
Furuta
Y
Y
Fukatani
A K
AK
Islam
D002875:Chromosomes; D005306:Fertilization; D017343:Genes, Plant; D005819:Genetic Markers; D001467:Hordeum / Q000235:genetics / Q000502:physiology*; D007525:Isoelectric Focusing; D008957:Models, Genetic; D011058:Pollen / Q000502:physiology*; D014908:Triticum / Q000235:genetics / Q000502:physiology*; D000516:alpha-Amylases / Q000235:genetics
D005819:Genetic Markers; D000516:alpha-Amylases