The researchers studied 65 wheat genotypes to see how they differ in traits like days to flowering, plant height, and grain yield. They found significant variability among the genotypes for these traits, indicating that the wheat plants have diverse genetic characteristics. The range of days to maturity varied between the parents and F1 crosses, with higher variability in traits like days to maturity compared to grain yield. This means that there is enough genetic diversity in the wheat plants they studied.