Pakistan rice genetic resources-I: Grain morphological diversity and its distribution

In order to ascertain the diversity for its possible utilization in rice grain quality improvement in Pakistan, local rice genetic resources (475 accessions) collected from 3-rice cultivation zones and other parts of the country were investigated for the seed characters. The distribution patterns of some interesting observations were also carried out. A wide variation was found in grain size and shape. Pakistan rice cultivars were dominated by long grain type while the short grains were absent, according to the measured length. However, based on grain length/width ratio, 1.3 % short grain types were present in NWFP/N. Areas.