Peach birch breeding (breeding for peach rootstock)

to study the genetic variation of peaches and their near-genus plants, and choose a science and technology to cultivate peach birch. Peach bogey is obvious, short life span, root tumor worm is very serious, the loss of yield can reach about 15%.early selection of peach birch appeared after the rise of peach grafting breeding, although there is a long history, but later than the breeding of peach varieties. Now engaged in peach birch breeding, only the United States, Canada, France and Japan and a few other countries.the general requirement for peach birch breeding is to cultivate good affinity, high seed germination rate or easy rooting, consistent growth, wide adaptability, strong resistance to birch. In terms of development trends, some countries have focused their breeding efforts on breeding semi-dwarfed and dwarfed birch, as well as on root-resistant worm birch. Since the 1940s, China alone has unearthed a number of precious mahogany resources. Such as the red-flower heavy-petaled sash and red-rooted Gansu peaches that are immune to the root nematodes; the fur cherries that can be used as dwarf birch (Prunus tomentosa Thunb.) and Yu Li (P.japonica Thunb.) and O'Leer (P.humilis Bge.) These resources can be used to cultivate mahogany trees adapted to different regions and uses.breeding pathways mainly have the following three aspects: 1. Introduction. In order to select the dwarf birch of peaches, Japan introduced long cherries and Yu Li from different parts of China to carry out grafting comparison experiments. Yu Li not only dwarfs well, but also has a good effect on yield and quality. Although the woolly cherries are short, they have poor affinity. 2. Live selection. Many mahoganys have been selected to suit different regions. Among these birch, there are southeastern regions adapted to China's warm and humid, grafting affinity is good, survival rate is high, the rapid growth of P.persica (L) Batsch. and so on. 3. Hybrid breeding