WOYM – How It All Began

Five Takeaways Origins of Bread Wheat: Bread wheat has its roots in the Fertile Crescent, dating back 8,000 to 10,000 years. It emerged from the hybridization of two wild grasses, leading to the domestication of three types of wheat: Einkorn, Emmer, and Common wheat. This historical context is crucial for understanding the evolution of our food systems. Genetic Complexity: Bread wheat is a hexaploid, meaning it has six sets of chromosomes (AABBDD). In contrast, Einkorn has 14 chromosomes (AA), and Emmer has 28 chromosomes (AABB). The contribution of Aegilops tauschii to the D genome of bread wheat highlights the intricate genetic makeup that supports its resilience. Wheat Genetics Resource Center: Established in 1981, the center has expanded its collection from 300 to over 10,000 lines of wild germplasm. This repository is vital for breeding programs, ensuring that we have access to the genetic diversity necessary for future wheat improvement. Research and Collaboration: Current research projects focus on enhancing traits like drought and disease resistance by utilizing wild relatives. The center's collaborations with various institutions globally underscore the importance of shared knowledge in advancing wheat genetics. Funding Challenges: The episode also touched on the difficulties of securing funding for agricultural research, particularly in wheat genetics. This is a pressing issue that impacts our ability to maintain genetic diversity and adapt to climate change. Timestamps (00:00) - Introduction to the Wheat's On Your Mind podcast and guests Bikram Gill and John Raupp. (00:27) - Background on Bikram Gill and John Raupp, their roles at the Wheat Genetics Resource Center. (00:57) - Discussion on the origins of bread wheat, tracing back 8,000 to 10,000 years. (01:26) - Explanation of the two parts of wheat's origin: natural hybridization and human domestication. (01:46) - Overview of the three types of wheat: monococcum, dicoccum, and common wheat. (02:40) - Insight into the selection process of bread wheat by early farmers. (03:06) - Statistics on bread wheat's significance as a staple crop globally. (03:16) - Discussion on the fertile crescent and the diversity of crops in that region. (03:40) - Explanation of how wild wheat’s hybridized with domesticated wheat over time. (04:03) - Clarification on the origin of Turkey Red Wheat and its naming. (04:16) - Introduction to the complexity of wheat as a hexaploid species. (04:43) - Historical context of wheat classification during World War I. (05:08) - Description of the chromosome numbers in different wheat types. (05:44) - Discussion on the identification of the third genome donor for bread wheat. (06:33) - Explanation of the relationship between goat grass and wheat. (07:30) - Insights into the challenges of researching hexaploid species. (08:28) - Discussion on the vision for the Wheat Genetics Resource Center and its establishment. (09:55) - Bikram shares his vision for the resource center and its importance for wheat research. (10:30) - Overview of the initial funding and support for the Wheat Genetics Resource Center. (12:10) - Description of the collection's growth and the hiring of key personnel. (13:34) - Discussion on expeditions to the Middle East for collecting wild wheat species. (14:12) - Insights into the genetic diversity found in wild wheat species. (15:36) - Overview of the significance of Aegilops tauschii in wheat breeding. (17:09) - Current size and distribution of the Wheat Genetics Resource Center's collection. (18:10) - Discussion on the adaptability of Aegilops tauschii across various habitats. (19:22) - Explanation of the genetic relationships between wild grasses and cultivated wheat. (20:03) - Overview of cytogenetics and its role in wheat research. (21:40) - Discussion on the importance of sequencing the bread wheat genome. (22:52) - Challenges faced in sequencing the wheat genome and the international collaboration involved. (24:14) - Comparison of the wheat genome size to other species, including humans. (25:19) - Explanation of genetic buffering in wheat and its implications for resilience. (26:01) - John’s role as curator of the Wheat Genetics Resource Center and his responsibilities. (27:43) - Discussion on the maintenance and distribution of the wheat collection. (29:05) - Insights into the domestication of wheat and its impact on agriculture. (30:41) - Overview of the National Science Foundation's support for the Wheat Genetics Resource Center. (32:08) - Current research projects under the National Science Foundation center. (34:05) - Discussion on the potential of ancient grasses and ongoing research opportunities. (36:01) - Overview of the public accessibility of the wheat collection and global requests for seeds. (38:06) - Insights into the advancements in technology and their impact on wheat research. (39:12) - Discussion on the future of gene editing and its potential in wheat improvement. (41:35) - Overview of the redundancy and security of seed collections worldwide. (43:45) - Discussion on the importance of preserving genetic diversity in wild wheats. (46:02) - Bikram's ongoing work in India and its relevance to wheat genetics. (47:32) - Closing remarks and thanks to guests for their insights on wheat genetics. Kansas Wheat Wheats On Your Mind