The introduction of trees can be traced back to 2000 years ago(plastic plant trays wholesale), and the early study of genetic variation within trees can also be traced back to 400 years ago. In the 19th century, British naturalist Darwin (1809-1882) put forward the evolutionism theory based on natural selection in his works(1 gallon plant pots distributor), such as the origin of species, so as to make clear the variability of species and the adaptability of organisms.
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From the end of 19th century to the beginning of 20th century(plastic plant pots wholesale suppliers), the work of American plant breeder L. burtank (1849-1926) and Soviet plant breeder Michelin (1855-1935) played a positive role in the occurrence and development of forest breeding(bulk 1.5 gallon pots). The large-scale introduction work started from the introduction of pines from Australia, New Zealand and other countries in the southern hemisphere in the 1850s.(large black plastic pots for plants manufacturers usa)
Later, some Swedish foresters perfected his method and developed it into today's seed orchard(square grow pots). In 1892, the first meeting of IUFRO discussed and formulated the international provenance test plan of main afforestation species. In 1908, the international provenance experiments of Pinus densiflora and Picea koraiensis were arranged(2 gallon plant pots distributor). In the 1930s and after the Second World War, provenance experiments were carried out in many tree species.
(large black plastic pots for plants manufacturers usa)In the 19th century, crossbreeding was the active center of plant breeding(seed starting trays). German professor of Botany kldnch first carried out crossbreeding between European red pine and European black pine in 1845. At the end of the 19th century, Irish A. Henry began to carry out poplar crossbreeding(bulk 2 gallon containers). At the beginning of the 20th century, the United States, Italy and Germany also carried out poplar crossbreeding, especially in Italy.
The famous European and American poplar clone l-214 was in the 20th century It was raised in the 1920s(gallon pot). Unfortunately, no significant results have been achieved. His theory has had an impact on the field of forestry. In 1821, de vilmwin of France made the first provenance experiment of European red pine near Paris(3 gallon nursery container wholesale price). However, systematic and strict research began in the 19th century. The practice of tree breeding has a long history.
In 1930's, there was a high tide of cross breeding(cheap plastic plant pots bulk), and a lot of experiments were made in pine, larch, banqu, elm and other tree species, but the most effective ones were still limited to Populus. In 1945, Professor Ye Weizhong of China carried out poplar hybridization in Tianshui. In 1936, nilssun Ehle, Sweden, discovered triploid aspen clones(24 cell trays bulk), and the discovery and utilization of colchicine, Zengcheng, caused a boom in polyploid breeding.
Some foreign foresters have noticed the variation among individual trees in the forest, but it was not until 1930s that c.5.lamen(large plastic terracotta pots), a Danish forester, grafted the selected larch, European wax and other excellent trees to produce seeds. The asexual propagation of broad-leaved tree species such as willow has a history of several years(4 cell trays bulk). It can be said that before the 1950s, forest breeding was in the stage of preparation.(large black plastic pots for plants manufacturers usa)