Topic: Biology

Scientists found a natural way to protect bananas from a deadly fungus. They discovered a special gene in wild bananas that makes them resistant to the disease.

This breakthrough could save the global banana supply from a serious threat. The team at The University of Queensland, led by Dr. Andrew Chen and Professor Elizabeth Aitken, found the source of resistance to Fusarium wilt Sub Tropical Race 4 (STR4) in a wild diploid banana called Calcutta 4.

Fusarium wilt is a soil-borne disease that attacks bananas through the soil, causing them to wilt and die. Even worse, it leaves behind long-lasting contamination in the soil, putting future crops at risk.

The team used advanced genetics to map the genetic resistance in Calcutta 4. They crossed this wild banana with susceptible bananas from another diploid subspecies and then tested their offspring for disease resistance.

After five years of work, they found that the resistant trait is located on chromosome 5 in Calcutta 4. This discovery will support the development of commercial banana varieties that can withstand Fusarium wilt.

The next step is to develop molecular markers to track this resistance trait efficiently so plant breeders can screen seedlings early and accurately before any disease symptoms appear.

Why It Matters

This breakthrough could help Indian farmers protect their banana crops from this deadly disease. It's crucial for food security in India, where bananas are a staple crop.

Key Facts

• Scientists found a natural way to protect bananas from Fusarium wilt Sub Tropical Race 4 (STR4).
• The resistant trait is located on chromosome 5 in Calcutta 4, a wild diploid banana.
• The team used advanced genetics to map the genetic resistance in Calcutta 4.
• The discovery will support the development of commercial banana varieties that can withstand Fusarium wilt.
• The project required five years of work and was funded by Hort Innovation through banana industry levy funds.

Key Terms

Fusarium wilt

A soil-borne disease that attacks bananas, causing them to wilt and die

Implications

This breakthrough could help Indian farmers protect their banana crops from this deadly disease. It's crucial for food security in India, where bananas are a staple crop.