A Database for Triticeae and Avena
II. 4. Multifloret condition in barley.
Avinash Chandra and K. H. Makde, Department of Botany, Dharampeth Mahavidyalaya,
Nagpur (M.S.) India.
The natural genetic variability owes its origin to spontaneous mutations.
The nature of induced mutations is quite similar to that of spontaneous
ones, and they are being exploited for evolution under man's control, especially
where the improvement is easily identifiable and controlled by few genes.
The main object of our research is to obtain beneficial mutants for high
yielding ability, associated with some other promising traits in barley,
hence the present investigation has been undertaken.
Certified dry and dormant caryopsis of barley, Hordeum distichum
L., var. Clipper (Fig. 1) were irradiated with 5, 10, 15, 20, 30, 40 and
50 kr doses of 60Co gamma-rays. Irradiated caryopsis were sown
in research farm for obtaining M1 generation. Plants were chosen on the
basis of high sterility or high chromosomal aberrations in pollen mother
cells and also looking phenotypically abnormal. They were considered as
M1 families and further grown for M2 generation. In the huge populations
of M2 generations only six mutants having multifloret condition, such as
double eared which emerged from different nodes (Fig. 2), double eared
from same node (Fig. 3), triple eared (Fig. 4), four eared originated from
different nodes (Fig. 5), five eared on same node (Fig. 6), and multieared
condition from different nodes (Fig. 7), were screened out and further
tested in M3, M4 and M5 generations. In all the cases plant productivity
was positively affected by number of ear bearing stems, reflected by multiflorets
condition. It has been decided to undertake hybridization between elite
mutants in the succeeding generations.
BGN 10 toc
BGN Main Index