A kind of breeding method and breeding method of double-petal dwarf hollyhock cytoplasmic male sterile line

Abstract

The invention relates to a breeding method and a seed reproduction method of plants, in particular to a breeding method and a seed reproduction method of hollyhock, and belongs to the field of plant breeding. The transferred hollyhock male sterility line obtained by the breeding method and the seed reproduction method has the outstanding advantages as follows: the bred double-petal dwarf hollyhock cytoplasm male sterility line and the bred double-petal dwarf hollyhock cytoplasm male sterility maintainer line have remarkable double-petal dwarf marker characters, the male sterility is stable, the sterile plant rate and the sterile plant density are more than 100%, without being influenced by the environment condition, the hybridization rate of the hybrid cultivar prepared in an isolation area can reach 100%, the combining ability is good, the bred double-petal dwarf hollyhock cytoplasm male sterility line is used to be hybridized with a plurality of pure hollyhock lines, most of combinations of the bred double-petal dwarf hollyhock cytoplasm male sterility line and the hollyhock varieties have the heterobeltiosis such as disease resistance, vigorous growth, dwarf plants and bright color; bee pollination is carried out during the cultivation process of sterile line breeding and hybrid cultivar cultivating process, so that the labor and cost are reduced remarkably.

Description

technical field [0001] The invention relates to a plant breeding method and seed propagation method, in particular to a hollyhock breeding method and seed propagation method, and belongs to the field of plant breeding. Background technique [0002] Hollyhock [Althaearosea (Linn.) Cavan] is a biennial upright herbaceous plant of the Malvaceae genus Hollyhock, with large flowers and rich colors (red, white or pink, etc.), and a long flowering period. It is an important traditional flower plant in my country. At present, hybrid breeding is an important means of creating new varieties or types of flowers. It can not only combine the excellent characteristics and characteristics of two or more species and varieties, but also produce huge heterosis, improve the growth potential of flowers, Resilience, etc. Large-scale propagation of hollyhock generally adopts natural hybridization method, and the amount of seeds produced by a single flower is small, and it is difficult to obtain ...

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