Cavendish | |
---|---|
Species | Musa acuminata |
Cultivar group | Cavendish subgroup of the AAA Group |
Cultivar group members | See text |
Cavendish bananas are the fruits of one of a number of banana cultivars belonging to the Cavendish subgroup of the AAA banana cultivar group (triploid cultivars of Musa acuminata ). The same term is also used to describe the plants on which the bananas grow.
They include commercially important cultivars like 'Dwarf Cavendish' (1888) and 'Grand Nain' (the "Chiquita banana"). Since the 1950s, these cultivars have been the most internationally traded bananas. [1] They replaced the Gros Michel banana after it was devastated by Panama disease.
They are unable to reproduce sexually, instead being propagated via identical clones. Due to this, the genetic diversity of the Cavendish banana is very low. This, combined with the fact the Cavendish is planted in dense chunks in a monoculture without other natural species to serve as a buffer, makes the Cavendish extremely vulnerable to disease, fungal outbreaks, and genetic mutation, possibly leading to eventual commercial extinction. [2] [3] [4]
Cavendish bananas were named after William Cavendish, 6th Duke of Devonshire. Though they were not the first known banana specimens in Europe, in around 1834 Cavendish received a shipment of bananas (from Mauritius) courtesy of the chaplain of Alton Towers (then the seat of the Earls of Shrewsbury). His head gardener and friend, Sir Joseph Paxton, cultivated them in the greenhouses of Chatsworth House. The plants were botanically described by Paxton as Musa cavendishii, after the Duke. [5] For his work, Paxton won a medal at the 1835 Royal Horticultural Society show. [6]
The Chatsworth bananas were shipped off to various places in the Pacific around the 1850s. It is believed that some of them may have ended up in the Canary Islands, [5] though other authors believe that the bananas in the Canary Islands had been there since the fifteenth century and had been introduced by early Portuguese explorers who obtained them from West Africa and were later responsible for spreading them to the Caribbean. [7] African bananas in turn were introduced from Southeast Asia into Madagascar by early Austronesian sailors. [8] In 1888, bananas from the Canary Islands were imported into England by Thomas Fyffe. These bananas are now known to belong to the Dwarf Cavendish cultivar. [9]
Cavendish bananas entered mass commercial production in 1903 but did not gain prominence until later when Panama disease attacked the dominant Gros Michel ("Big Mike") variety in the 1950s. Because they were successfully grown in the same soils as previously affected Gros Michel plants, many assumed the Cavendish cultivars were more resistant to Panama disease. Contrary to this notion, in mid-2008, reports from Sumatra and Malaysia suggested that Panama disease had started attacking Cavendish cultivars. [10]
After years of attempting to keep it out of the Americas, in mid-2019, Panama disease Tropical Race 4 (TR4), was discovered on banana farms in the coastal Caribbean region. With no fungicide effective against TR4, the Cavendish may meet the same fate as the Gros Michel. [11]
Cavendish bananas are a subgroup of the triploid (AAA) group cultivars of Musa acuminata . [12]
Cavendish cultivars are distinguished by the height of the plant and features of the fruits, [7] [13] and different cultivars may be recognized as distinct by different authorities. The most important clones for fruit production include: 'Dwarf Cavendish', 'Grande Naine', 'Lacatan' (bungulan), 'Poyo', 'Valéry', and 'Williams' under one system of cultivar classification. [7] Another classification includes: 'Double', 'Dwarf Cavendish', 'Extra Dwarf Cavendish', 'Grande Naine', 'Pisang Masak Hijau' (syn 'Lacatan'), and 'Giant Cavendish' as a group of several difficult to distinguish cultivars (including 'Poyo', 'Robusta', 'Valéry', & 'Williams'). [13] 'Grande Naine' is the most important clone in international trade, while 'Dwarf Cavendish' is the most widely grown clone. [13] 'Grande Naine' is also known as Chiquita banana. [14]
Cavendish bananas accounted for 47% of global banana production between 1998 and 2000, and the vast majority of bananas entering international trade. [1]
The fruits of the Cavendish bananas are eaten raw, used in baking, fruit salads, and to complement foods. The outer skin is partially green when bananas are sold in food markets, and turns yellow when the fruit ripens. As it ripens, the starch is converted to sugars turning the fruit sweet. When it reaches its final stage (stage 7), brown/black "sugar spots" develop. When overripe, the skin turns black and the flesh becomes mushy.
Bananas ripen naturally or through an induced process. Once picked, they can turn yellow on their own provided that they are fully mature by the time they are being harvested, or can be exposed to ethylene gas [15] to induce ripening. Bananas which are turning yellow emit natural ethylene which is characterized by the emission of sweet scented esters. [16] Most retailers sell bananas in stages 3–6, with stage 5–7 being the most ideal for immediate consumption. The PLUs used for Cavendish bananas are 4011 (yellow) and 4186 (small yellow). Organic Cavendish bananas are assigned PLU 94011. [17]
Cavendish bananas, accounting for around 99% of banana exports to developed countries, are vulnerable to the fungal disease known as Panama disease. There is a risk of extinction of the variety. Because Cavendish bananas are parthenocarpic (they don't have seeds and reproduce only through cloning), their resistance to disease is often low. Development of disease resistance depends on mutations occurring in the propagation units, and hence evolves more slowly than in seed-propagated crops. [18]
The development of resistant varieties has therefore been the only alternative to protect the fruit trees from tropical and subtropical diseases like bacterial wilt and Fusarium wilt, commonly known as Panama disease. A replacement for the Cavendish would likely depend on genetic engineering, which is banned in some countries. Conventional plant breeding has not yet been able to produce a variety that preserves the flavor and shelf-life of the Cavendish. [19] [20] In 2017, James Dale, a biotechnologist at Queensland University of Technology in Brisbane, Australia, produced just such a transgenic banana resistant to Tropical Race 4. [21]
In 2023, the Philippine Space Agency and Bureau of Plant Industry utilized pest control against Fusarium oxysporum f.sp. cubense. In 2022, Philippines was second top banana exporter with Cavendish banana as the top variety. [22]
A banana is an elongated, edible fruit – botanically a berry – produced by several kinds of large treelike herbaceous flowering plants in the genus Musa. In some countries, cooking bananas are called plantains, distinguishing them from dessert bananas. The fruit is variable in size, color and firmness, but is usually elongated and curved, with soft flesh rich in starch covered with a peel, which may have a variety of colors when ripe. It grows upward in clusters near the top of the plant. Almost all modern edible seedless (parthenocarp) cultivated bananas come from two wild species – Musa acuminata and Musa balbisiana, or hybrids of them.
Panama disease is a plant disease that infects banana plants. It is a wilting disease caused by the fungus Fusarium oxysporum f. sp. cubense (Foc). The pathogen is resistant to fungicides and its control is limited to phytosanitary measures.
Musa is one of three genera in the family Musaceae. The genus includes 83 species of flowering plants producing edible bananas and plantains, and fiber (abacá), used to make paper and cloth. Though they grow as high as trees, banana and plantain plants are not woody and their apparent "stem" is made up of the bases of the huge leaf stalks. Thus, they are technically gigantic herbaceous plants.
Gros Michel, often translated and known as "Big Mike", is an export cultivar of banana and was, until the 1950s, the main variety grown. The physical properties of the Gros Michel make it an excellent export produce; its thick peel makes it resilient to bruising during transport and the dense bunches that it grows in make it easy to ship.
The Dwarf Cavendish banana is a widely grown and commercially important Cavendish cultivar. The name "Dwarf Cavendish" is in reference to the height of the pseudostem, not the fruit. Young plants have maroon or purple blotches on their leaves but quickly lose them as they mature. It is one of the most commonly planted banana varieties from the Cavendish group, and the main source of commercial Cavendish bananas along with Grand Nain.
The Goldfinger banana (FHIA-01) is a banana cultivar developed in Honduras. The cultivar, developed at the Honduran Foundation for Agricultural Research (FHIA) by a team of scientists led by Phillip Rowe and Franklin Rosales, has been bred to be pest-resistant and crop-yielding.
Red bananas are a group of varieties of bananas with reddish-purple skin. Some are smaller and plumper than the common Cavendish banana, others much larger. Ripe, raw red bananas have a flesh that is creamy to light pink. They are also softer and sweeter than the yellow Cavendish varieties, some with a slight tangy raspberry flavor and others with an earthy one. Many red bananas are exported by producers in East Africa, Asia, South America, and the United Arab Emirates. They are a favorite in Central America, but are sold throughout the world.
The Grand Nain banana is a banana cultivar of Musa acuminata. It is one of the most commonly cultivated bananas and a member of the commercial Cavendish banana cultivar group. It is also known as the Chiquita banana because it is the main product of Chiquita Brands International.
Rhino Horn bananas, also called Rhino Horn plantains or African Rhino Horn, are hybrid banana cultivars from Africa. It produces strongly curved and elongated edible bananas which can grow to a length of two feet, the longest fruits among banana cultivars.
Musa acuminata is a species of banana native to Southern Asia, its range comprising the Indian Subcontinent and Southeast Asia. Many of the modern edible dessert bananas are from this species, although some are hybrids with Musa balbisiana. First cultivated by humans around 8000 BCE, it is one of the early examples of domesticated plants.
The Blue Java is a hardy, cold-tolerant banana cultivar known for its sweet aromatic fruit, which is said to have an ice cream-like consistency and flavor reminiscent of vanilla. It is native to Southeast Asia and is a hybrid of two species of banana native to Southeast Asia—Musa balbisiana and Musa acuminata.
Fusarium oxysporum f. sp. cubense is a fungal plant pathogen that causes Panama disease of banana, also known as Fusarium wilt. The fungi and the related disease are responsible for widespread pressure on banana growing regions, destroying the economic viability of several commercially important banana varieties.
Saba banana is a triploid hybrid (ABB) banana cultivar originating from the Philippines. It is primarily a cooking banana, though it can also be eaten raw. It is one of the most important banana varieties in Philippine cuisine. It is also sometimes known as the "cardaba banana", though the latter name is more correctly applied to the cardava, a very similar cultivar also classified within the saba subgroup.
Lady finger bananas are diploid banana cultivars originating in Malaysia or Indonesia, belonging to the Sucrier subgroup of the AA banana cultivar group. Lady finger bananas are the most widely cultivated AA cultivar and are one of the world’s most popular local bananas. Its fruits are finger-sized, sweet, and thin-skinned.
The Latundan banana is a triploid hybrid banana cultivar of the AAB "Pome" group from the Philippines. It is one of the most common banana cultivars in Southeast Asia and the Philippines, along with Lacatan and Saba bananas. Its Malaysian name is pisang rastali.
Lakatan bananas, also spelled Lacatan, are diploid banana cultivars from the Philippines. It is one of the most common banana cultivars in the Philippines, along with the Latundan and Saba bananas.
Matoke, locally also known as matooke, amatooke in Buganda, ekitookye in southwestern Uganda, ekitooke in western Uganda, kamatore in Lugisu, ebitooke in northwestern Tanzania, igitoki in Rwanda, Burundi and by the cultivar name East African Highland banana, are a group of starchy triploid banana cultivars, originating from the African Great Lakes. The fruit is harvested green, carefully peeled, and then cooked and often mashed or pounded into a meal. In Uganda and Rwanda, the fruit is steam-cooked, and the mashed meal is considered a national dish in both countries.
Masak Hijau bananas are triploid banana cultivars from Malaysia. It is a member of the commercially important Cavendish banana subgroup. It is a popular banana cultivar in Southeast Asia and the West Indies.
Cardava bananas, also spelled cardaba or kardaba, is a triploid hybrid (ABB) banana cultivar originating from the Philippines. It is primarily a cooking banana, though it can also be eaten raw. It is commonly confused with the more ubiquitous and closely related saba banana because they are used identically in traditional Filipino cuisine. Their common names can be interchanged in everyday usage though they are different cultivars.