User talk:GypsyJeffrey

GypsyJeffrey (talk) 21:25, 6 January 2021 (UTC) == Nairobi Rose ==

Genus	Rosa Hybrid parentage	'Dr. Darley' x 'Pretty Lady' Cultivar group	Floribunda Cultivar	HARpearl Marketing names	'Nairobi Rose' Breeder	Jeffrey Johnson Origin	Washington 2020

Created for Scientific use to study the flowering rate when exposed to stimulants.

Grafting has been important in flowering research. Leaves or shoots from plants induced to flower can be grafted onto uninduced plants and transmit a floral stimulus that induces them to flower.[13]

The transmission of plant viruses has been studied using grafting. Virus indexing involves grafting a symptomless plant that is suspected of carrying a virus onto an indicator plant that is very susceptible to the virus.

Grafting can transfer chloroplasts (specialized DNA in plants that can conduct photosynthesis), mitochondrial DNA and the entire cell nucleus containing the genome to potentially make a new species making grafting a form of natural genetic engineering.[14]

'''History

The birth of the world's first hybrid tea is generally accepted[3] to have been 'La France' in 1867. It was raised by Jean-Baptiste André Guillot, a French nurseryman.[4] He did it by hybridizing a tea rose, supposedly 'Madame Bravy', with a hybrid perpetual, supposedly 'Madame Victor Verdier', hence "hybrid tea".

Other early cultivars were 'Lady Mary Fitzwilliam' (Bennett 1883), 'Souvenir of Wootton' (John Cook 1888) and 'Mme. Caroline Testout', introduced by Pernet-Ducher in 1890.

Hybrid tea roses did not become popular until the beginning of the 20th century, when Pernet-Ducher in Lyons, France, bred the cultivar 'Soleil d'Or' (1900).[5] But the cultivar that made hybrid teas the most popular class of garden rose of the 20th century was the rose Peace ('Madame A. Meilland'), introduced by Francis Meilland at the end of World War II, and one of the most popular rose cultivars of the 20th century.

Michele Meilland Richardier cultivated a hybrid tea which had double flowers, with a coral inside and a yellow and pink outside. It was said to last very well when cut.[6] The rose was classified as being part of the meilimona variety. The patent was filed on October 14, 1975 and was issued February 1, 1977.[7]

Most hybrid tea cultivars are not fully hardy in continental areas with very cold winters (below −25 °C). This, combined with their tendency to be stiffly upright, sparsely foliaged and often not resistant to diseases, has led to a decline in hybrid tea popularity among gardeners and landscapers in favor of lower-maintenance "landscape" roses.[citation needed] The hybrid tea remains the standard rose of the floral industry, however, and is still favored in small gardens in formal situations.

Propagation This is usually done by budding, a technique that involves grafting buds from a parent plant onto strongly growing rootstocks. One such rootstock is R. multiflora.

Hybrid tea cultivars bred in continental areas (e.g. Canada) tend to be hardier than those hailing from more maritime regions (e.g. New Zealand). Grafting or graftage[1] is a horticultural technique whereby tissues of plants are joined so as to continue their growth together. The upper part of the combined plant is called the scion (/ˈsaɪən/) while the lower part is called the rootstock. The success of this joining requires that the vascular tissues grow together and such joining is called inosculation. The technique is most commonly used in asexual propagation of commercially grown plants for the horticultural and agricultural trades.

In most cases, one plant is selected for its roots and this is called the stock or rootstock. The other plant is selected for its stems, leaves, flowers, or fruits and is called the scion or cion.[1] The scion contains the desired genes to be duplicated in future production by the stock/scion plant.

In stem grafting, a common grafting method, a shoot of a selected, desired plant cultivar is grafted onto the stock of another type. In another common form called bud grafting, a dormant side bud is grafted onto the stem of another stock plant, and when it has inosculated successfully, it is encouraged to grow by pruning off the stem of the stock plant just above the newly grafted bud.

For successful grafting to take place, the vascular cambium tissues of the stock and scion plants must be placed in contact with each other. Both tissues must be kept alive until the graft has "taken", usually a period of a few weeks. Successful grafting only requires that a vascular connection take place between the grafted tissues. Research conducted in Arabidopsis thaliana hypocotyls have shown that the connection of phloem takes place after 3 days of initial grafting, whereas the connection of xylem can take up to 7 days.[2] Joints formed by grafting are not as strong as naturally formed joints, so a physical weak point often still occurs at the graft because only the newly formed tissues inosculate with each other. The existing structural tissue (or wood) of the stock plant does not fuse. Examples

'Double Delight' hybrid tea A very large number of hybrid tea cultivars have been introduced by breeders over the years; some notable examples include 'Chrysler Imperial', 'Double Delight', 'Elina', 'Fragrant Cloud', 'Mister Lincoln', Peace and 'Precious Platinum'.

GypsyJeffrey (talk) 21:25, 6 January 2021 (UTC)

Refrences https://en.wikipedia.org/wiki/Grafting#Scientific_uses

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Theroadislong (talk) 21:42, 6 January 2021 (UTC)