Two wild rice species, Oryza nivara and 0. rufipogon, four improved varieties and two landraces were used to study the
morphological variation and crossability between them during 2004/05 and 2005/06 at Khwnaltar. Data on nine quantitative and
fifteen qualitative traits were recorded to characterize and assess the diversity. Variations in legule length (5.8-29mm). heading days
(64-90 days), culm length (46.2-114.4cm) culm number (14.2-59) for wild rice and 1.44-3Il1Ill, 105-132days, 88.6-136.8cm, and 7.2-
15.8 respectively were observed in cultivated rice. The qualitative traits also showed greater variability between wild and cultivated
rice. Out of fourteen crosses between 0. sativa and two wild rice species, the highest crossability (41.86%) was observed in Jumli
marsi and 0 . nivara cross and the lowest crossability (2.56%) in Chainung-242 and 0. rufipogon cross were observed. Variation in
crossability ranged from 2.56-41.86 percent The examined wild and cultivated rice varieties have high variability for morphological
traits, which can be used in crop improvement programme in future.

Two wild rice species, Oryza nivara and 0. rufipogon, four improved varieties and two landraces were used to study the
morphological variation and crossability between them during 2004/05 and 2005/06 at Khwnaltar. Data on nine quantitative and
fifteen qualitative traits were recorded to characterize and assess the diversity. Variations in legule length (5.8-29mm). heading days
(64-90 days), culm length (46.2-114.4cm) culm number (14.2-59) for wild rice and 1.44-3Il1Ill, 105-132days, 88.6-136.8cm, and 7.2-
15.8 respectively were observed in cultivated rice. The qualitative traits also showed greater variability between wild and cultivated
rice. Out of fourteen crosses between 0. sativa and two wild rice species, the highest crossability (41.86%) was observed in Jumli
marsi and 0 . nivara cross and the lowest crossability (2.56%) in Chainung-242 and 0. rufipogon cross were observed. Variation in
crossability ranged from 2.56-41.86 percent The examined wild and cultivated rice varieties have high variability for morphological
traits, which can be used in crop improvement programme in future.