Cotton Comparison (IMAGE) University of Texas at Austin Caption Upland allotetraploid cotton (right) comes from two extant diploid species, closely related to today's <i>G. raimondii</i> (left) and<i> G. arboreum</i> (middle) or <i>G. herbacieum</i>. The interactions between the genes of these two ancestral species are what give modern-day cotton its best qualities. Somehow, these two different lineages come together to create something greater than the sum of its parts. Credit Laboratory of Z. Jeffrey Chen. Usage Restrictions The image may only be used with appropriate caption or credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.