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Gossypium hirsutum

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Gossypium hirsutum is a major plant species used for fiber. It is commonly known as upland cotton or Mexican cotton. This plant is the most widely grown cotton species on Earth. It is vital to the global textile industry. About 90% of all cotton produced worldwide comes from this species. In the United States, its importance is even higher. The U.S. is the largest exporter of cotton in the world. There, this species makes up approximately 95% of all cotton production.

Gossypium hirsutum Florida
Gossypium hirsutum Florida

The biological history of this plant is quite complex. Scientists believe it began as a hybrid species. It likely formed when wild Mexican cotton mixed with Gossypium herbaceum. This mixing occurred roughly 5 to 10 million years ago. This process is known as polyploidy. Through polyploidy, the new species developed 26 pairs of chromosomes. This unique genetic makeup helped define the species we recognize today.

Humans have interacted with this plant for thousands of years. Archaeological evidence provides clues about its early history. In the Tehuacan Valley of Mexico, researchers found signs of its use. This evidence dates back as far as 3,500 BC. This is currently the earliest evidence of cotton cultivation in the Americas. While we see these ancient traces, we do not know exactly where it was first domesticated.

Gossypium hirsutum Florida
Gossypium hirsutum Florida

This species is native to many different regions. Its natural range stretches from Mexico down to Ecuador. It is also found in northeast Brazil. The plant grows in the Caribbean, specifically in the Leeward Antilles. Additionally, it is native to Pacific islands. These include Fiji, the Marianas, Polynesia, and the Revillagigedo Islands. This wide range shows how well the plant adapts to different environments.

Farmers grow different varieties of Gossypium hirsutum. These varieties are often cross-bred cultivars. They are categorized by the length of their fibers. Some varieties produce long fibers. These are called long staple upland. Other varieties produce shorter fibers. These are called short staple upland. Most commercial production focuses on the long staple varieties. This is because the longer fibers are often more useful for making cloth.

The plant also has interesting biological features. It produces something called extrafloral nectar. This is a sweet liquid produced outside of the flowers. This nectar serves a specific purpose in the ecosystem. It acts as a food source for parasitic wasps. This relationship shows how the plant connects to other living things.

Gossypium hirsutum Florida
Gossypium hirsutum Florida

Beyond making fabric, the plant has many other uses. It is not just a fiber crop. Along with Gossypium herbaceum, it is a main source of cottonseed oil. This means the seeds are valuable too. Different cultures have also used the plant for spiritual reasons. For example, the Zuni people use the plant to make ceremonial garments. They also turn the plant's fuzz into cords for use in ceremonies. This shows the plant's deep importance to human history and culture.

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File:Gossypium hirsutum Florida.jpg
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