Seedling growing method for overcoming self-incompatibility of pears

Abstract

Provided is a seedling growing method for overcoming self-incompatibility of pears. The method includes the steps of stock seedling breeding and grafting. According to the step of grafting, two varieties are selected and combined as cions, and the two varieties are different in S gene classification, synchronous in flowering phase, large in pollen quantity and strong in pollen viability; in breeding of pear variety seedlings without pollen, the pear variety seedlings need to be combined with other two varieties or three varieties as cions, and the two varieties or three varieties are different in S gene classification, synchronous in flowering phase, large in pollen quantity and strong in pollen viability; the grafting method is bud grafting, the combinations of the two varieties are Yuan Huang (S3S4)+Cui Guan (S2S5), and the like, and the combinations of the three varieties is Xin Gao (S3S9)+Yuan Huang (S3S4)+Cui Guan (S2S5), and the like. According to the seedling growing method for overcoming the self-incompatibility of the pears, problems existing in pollination variety selective breeding of the pears are fundamental solved in the seedling breeding stage, and therefore great economic losses brought to orchard workers in production and caused by the self-incompatibility of the pears can be avoided.

Description

technical field [0001] The invention belongs to the technical field of pear tree cultivation, and relates to a seedling raising method for overcoming the self-incompatibility of pear trees. Background technique [0002] Pear is the second largest deciduous fruit tree mainly planted in my country and occupies an important position in the national economy. According to statistics from the Food and Agriculture Organization of the United Nations (FAO), in 2011 China's pear harvested area and total output were 1.132 million hectares and 15.945 million tons, accounting for 70.1% and 66.7% of the world's total pear harvested area and output, ranking first in the world. But in production, due to self-incompatibility of pears, it is necessary to correctly configure pollination varieties to obtain economic yield. This brings great inconvenience to producers. [0003] Self-incompatibility (SI) is an important mechanism for flowering plants to prevent inbreeding and maintain species c...

AI Technical Summary

Problems solved by technology

At present, molecular biology studies have confirmed that pear is a gametophyte self-incompatibility type plant controlled by multiple alleles at a single locus, and its self-incompatibility is caused by multiple alleles at a locus (self- incompatibility allele, referred to as S-allele or S-gene), which means that when self-pollination or cross-pollination between varieties of the same S genotype, the pollen can germinate on the stigma, but the The style is inhibited on the way to the ovary, and the growth stops, and the fertilization cannot be completed, resulting in self-pollination or cross-pollination between varieties of the same S genotype.

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