BGN 10: Multifloret condition in barley BARLEY GENETICS NEWSLETTER, VOL. 10, II. RESEARCH NOTES
Chandra and K. H. Makde, pp. 10-11

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.

Figures 1-7.

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