A method for early selection of high-generation excellent trees of Cenxi soft-twig Camellia oleifera
A technology for Cenxi soft branches and Camellia oleifera, which is applied in the field of forest tree breeding, can solve the problems of long selection period and restrict the breeding process of Camellia oleifera high generation, etc., and achieve the effects of fast growth, saving breeding costs and shortening breeding period.
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Embodiment 1
[0032] In 2007, plant selection was carried out in the 3-year-old Cenxi Softwood Camellia oleifera F1 all-sib progeny forest. The plants with open canopy, good growth, many flower buds and even distribution, many fruits, large grains, and no pests and diseases were selected, and the plants were tested. crown width, fresh fruit yield per plant, single seed weight and anthracnose susceptibility rate. According to the primary selection criteria: the fruit yield per square meter crown area of the optimal tree is ≥1.25kg, the weight of a single seed is ≥2.5g, the fruit disease rate is below 3%, and 31 optimal plants are initially selected.
[0033] In January 2008, we firstly collected and selected excellent tree spikes, and used ordinary Camellia oleifera buds as rootstocks to carry out bud seedling anvil grafting. At the end of June 2008, after the first round of lignification of new shoots of grafted seedlings, the growth indicators such as seedling height, ground diameter and...
Embodiment 2
[0037] In October 2009, in the 5-year-old Cenxi Softwood Camellia second-generation half-sibling family forest, selected excellent trees, selected plants with strong growth, many fruits, many flower buds and evenly distributed, measured the crown width of the plants, the fresh fruit yield per plant, For single seed weight and anthracnose disease rate, according to the standards of fruit yield of more than 1.25kg per square meter of canopy area, single seed weight of more than 2.5g, and diseased fruit rate of less than 3%, 14 excellent trees were initially selected. In 2010 and 2011, when the fruit was ripe, the re-selection and final selection surveys were carried out on the first-selected excellent trees, and the crown width, fresh fruit yield per plant, fruit economic traits and anthracnose susceptibility rate were measured.
[0038] In early 2009, while selecting the best trees, we collected the robust branches growing outside the canopy, and used the 1-year-old seedlings of...
Embodiment 3
[0041]In November 2013, selection was carried out in the 4-year-old Cenxi Soft Branch Camellia oleifera three-generation half-sibling family forest. Select plants with open canopy, good growth, many flower buds and even distribution, many fruits, large grains, and no pests and diseases. Measure the crown width, fresh fruit yield per plant, single seed weight and anthracnose disease rate. Plants with a canopy area of more than 1.25kg of fruit, a single seed weight of more than 2.5g, and a fruit susceptibility rate of less than 3% are primary selected excellent trees, with a total of 11 plants.
[0042] In February 2014, we first collected and selected excellent tree spikes, and used ordinary Camellia oleifera buds as rootstocks for grafting. In July of the same year, after the first round of lignification of new shoots of grafted seedlings, the first screening was carried out at the seedling stage, and the height, ground diameter and number of leaves of grafted seedlings were...
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