Method for obtaining lagerstroemia and heimia intergeneric hybrid

Abstract

The invention relates to a method for obtaining a lagerstroemia and heimia intergeneric hybrid, which comprises the following specific steps: 1) carrying out intergeneric artificial hybridization by taking heimia salicifolia of heimia as a female parent and lagerstroemia indica of lagerstroemia as a male parent; 2) after hybridization, spraying hormone to stigmas of the female parent for fruit retention, and taking immature fruits for embryo rescue to obtain a hybrid progeny material; and 3) carrying out morphological observation on the hybrid progeny, and carrying out hybrid identification by adopting an SSR molecular marker to obtain the lagerstroemia and heimia intergeneric hybrid. By utilizing the method, intergeneric gene exchange between the lagerstroemia and the heimia is realized, a new intergeneric hybridization germplasm is obtained, the cultivation of a new lagerstroemia variety by utilizing intergeneric hybridization becomes possible, and the method provided by the invention can also be used for researching the genetic relationship of the related genus.

Description

technical field [0001] The invention relates to the field of plant breeding, in particular to a method for obtaining intergenus hybrids of Lagerstroemia genus and Huangwei genus. Background technique [0002] Plants of the genus Lagerstroemia are deciduous or evergreen shrubs or trees belonging to the Lythraceae family, and are important summer flowering plants. There are about 55 species of Lagerstroemia in the world, and they are mostly distributed in southern, eastern, southeastern Asia and northern Australia. At present, the related work of Lagerstroemia genus plant breeding is being carried out at home and abroad, including germplasm resources, propagation, cultivation, pest control, molecular biology research, etc., resistance breeding, fragrant flower breeding, dwarf breeding, large flower breeding and new flower color breeding. It has become a hot spot in the research of crape myrtle breeding. Through cross breeding, crape myrtle varieties resistant to powdery milde...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the current situation that Lagerstroemia plants lack yellow flowers, and provides a method for obtaining hybrids between Lagerstroemia and Huangwei, so as to improve the flower color traits of Lagerstroemia plants

Due to the existence of reproductive isolation, distant hybrids usually cannot form viable offspring under natural conditions. As the distance between the parental races increases, pollen cannot germinate, pollen tubes cannot elongate, and hybrid embryos are aborted. and other problems, making it more difficult to obtain hybrid offspring

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