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| Rajka | |
|---|---|
 | |
| Hybrid parentage | Champion (apple) × UEB 1200/1 [1] |
| Cultivar | Rajka |
| Origin | Czechia |
Rajka is a hybrid cultivar of domesticated apple from Czechia, specifically for eating. It was crossed and developed by the Institute of Experimental Botany from the Champion and Katka apples for scab resistance and is possible to grow according to organic standards.
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The tree from which the Rajka apple is grown is moderately vigorous[ clarification needed ], standard-type[ clarification needed ], produces spurs freely, precocious in cropping[ clarification needed ], and highly productive. The fruits do not fall prematurely, it is an easy pollinator with mid-season blossoming, and is resistant to scab and tolerant to powdery mildew.
Fruits are medium-to-large, globose and conical, of medium stem length. The yellow under-color is covered on almost the entire skin surface with a bright red over-color. There is some russeting in the stem cavity, which may occasionally extend over the base. The flesh is yellowish, juicy, with medium-grained texture and a distinctive, pleasant aroma.
Overall, it is an early-winter, disease-resistant, dessert-variety apple with outstanding color, rather sweet flavor, and medium storage life. It may also be suited to cooler areas. It has no specific requirements for rootstocks and is suitable for commercial orchards as well as for home gardens. [2]
The McIntosh, McIntosh Red, and sometimes misspelled as MacIntosh or colloquially the Mac, is an apple cultivar, the national apple of Canada. The fruit has red and green skin, a tart flavour, and tender white flesh, which ripens in late September. In the 20th century, it was the most popular cultivar in Eastern Canada and New England, and is considered an all-purpose apple, suitable both for cooking and eating raw.
Pears are fruits produced and consumed around the world, growing on a tree and harvested in late summer into mid-autumn. The pear tree and shrub are a species of genus Pyrus, in the family Rosaceae, bearing the pomaceous fruit of the same name. Several species of pears are valued for their edible fruit and juices, while others are cultivated as trees.
The tangelo, Citrus × tangelo, is a citrus fruit hybrid of a Citrus reticulata variety, such as mandarin orange or tangerine, and a Citrus maxima variety, such as a pomelo or grapefruit. The name is a portmanteau of 'tangerine' and 'pomelo'.
Apple scab is a common disease of plants in the rose family (Rosaceae) that is caused by the ascomycete fungus Venturia inaequalis. While this disease affects several plant genera, including Sorbus, Cotoneaster, and Pyrus, it is most commonly associated with the infection of Malus trees, including species of flowering crabapple, as well as cultivated apple. The first symptoms of this disease are found in the foliage, blossoms, and developing fruits of affected trees, which develop dark, irregularly-shaped lesions upon infection. Although apple scab rarely kills its host, infection typically leads to fruit deformation and premature leaf and fruit drop, which enhance the susceptibility of the host plant to abiotic stress and secondary infection. The reduction of fruit quality and yield may result in crop losses of up to 70%, posing a significant threat to the profitability of apple producers. To reduce scab-related yield losses, growers often combine preventive practices, including sanitation and resistance breeding, with reactive measures, such as targeted fungicide or biocontrol treatments, to prevent the incidence and spread of apple scab in their crops.
Russet Burbank is a potato cultivar with dark brown skin and few eyes that is the most widely grown potato in North America. A russet type, its flesh is white, dry, and mealy, and it is good for baking, mashing, and french fries (chips). It is a common and popular potato.
Venturia inaequalis is an ascomycete fungus that causes the apple scab disease.
An apple is a round, edible fruit produced by an apple tree. Apple trees are cultivated worldwide and are the most widely grown species in the genus Malus. The tree originated in Central Asia, where its wild ancestor, Malus sieversii, is still found. Apples have been grown for thousands of years in Asia and Europe and were introduced to North America by European colonists. Apples have religious and mythological significance in many cultures, including Norse, Greek, and European Christian tradition.
The Brina apple is an apple cultivar that was first developed in the Italy in the 1979s by open pollination PRI 2059-101 apples.
Liberty is a hybrid apple cultivar developed by the New York State Agricultural Experiment Station. It was a seedling produced in 1955 from pollinating 'Macoun' from 'Purdue 54-12' for the sake of acquiring Malus floribunda disease resistances. It was first released to the public in 1978.
Topaz is a cultivar of dessert apple that was developed in Czech Republic by the Institute of Experimental Botany for scab resistance. According to Orange Pippin it is "one of the best modern disease-resistant varieties, with fairly sharp flavour".
The Celebrity tomato cultivar is a hybrid (biology) that produces long fruit-bearing stems holding 20 or more very plump, robust tomatoes. Fruits weigh approximately 8 oz., and are 4 inches across. Plants need caging or staking, and produce fruit throughout the growing season. The celebrity tomato is a cultivar of the species Solanum lycopersicum. It is a crossbreed of the common tomato that is widely used for various culinary purposes. This tomato is of great size and is known to be resistant to most tomato diseases such as Fusarium wilt, Verticillium wilt, Tobacco mosaic virus and Root-knot nematode due to its hybrid nature. Celebrity tomatoes are highly adaptive to harsh environments and can grow in a wide range of places including dry, humid and wet regions. They are resistant to cracking and splitting which usually occurs when there is an excess of water and sugar movement in the fruits. Therefore, causing the tomato skin to grow at a slower rate compared to the expansion of the fruit. They can survive in harsh uneven rainfall. However, they are highly susceptible to colder environments and are at a higher risk of dying in regions with short growing seasons. The plants can grow up to 5 feet in height with bright red medium-sized fruits. The plants are generally very thick and grow in clusters. The tomato fruits are mostly used in the making of various salsas, salads, juices and canned food.
opal® is the brand name for apple cultivar 'UEB 32642'. The variety originates from a natural crossing of 'Golden Delicious' with 'Topaz'.
Applecrabs are various hybrids between crabapples and apples. They are bred for varying reasons, including disease resistance and use in cold climates because they are often hardier than apple trees and their fruit has the good eating qualities of apples.
Pristine apple is a hybrid cultivar of 'Co Op 10' x 'Camuzat' domesticated apples, which are descendants of the 'McIntosh' apple and the 'Starking Delicious'. This cultivar was developed and patented in the United States by the PRI disease resistant apple breeding program, in Indiana, United States in 1994, for its resistance to apple scab. It is susceptible to cedar-apple rust.
The PRI disease resistant apple breeding program is a joint project of the Purdue University, Rutgers University, and the University of Illinois, to breed apple cultivars to be resistant to apple scab. The initialism stands for the three involved universities: Purdue, Rutgers and Illinois.
'Alkmene' is a German cultivar of domesticated apple, also called 'Early Windsor'.
Winston is an English cultivar of domesticated apple which was first named Winter King because of its availability in the winter, but was renamed as Winston in 1944 or in 1945, after Winston Churchill.
Red Astrachan is a cultivar of domesticated apple of either Russian or Swedish origin, which is an early season apple, juicy, tart and mealy texture with pleasant flavour, and use for eating, cooking and cider. It is medium-sized, crimson colored. As all the early season apples, it is not good for storage. It is known by several other names including 'Abe Lincoln', 'American Red', and 'Waterloo'.
The 'Prima' apple is one of the modern disease resistant cultivars of domesticated apple which was bred by the PRI disease resistant apple breeding program in 1958. The disease resistance against apple scab has since been broken.
Tsunonozomi is a tangor cultivar grown in Japan.
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