CN1166275C - A kind of breeding method of begonia - Google Patents

Abstract

A breeding method for Begonia B.'Meinü' is provided, in which B.hemsleyana J.D.Hooker is used as the female parent and B.deliciosa Lind.et Fotsch. is used as the male parent, pollinated by artificial hybridization, and seedlings are raised Afterwards, it was selected and bred from the hybrid F-generation individuals.

Description

A kind of breeding method of begonia

Technical field: the present invention belongs to the technical field of new plant variety breeding, and in particular relates to a breeding method of Begonia 'beautiful' begonia.

Background technology: Begonia (Begonia L.) is one of the famous ornamental flowers in the world, widely distributed in tropical and subtropical regions. There are about 1500 species worldwide. There are about 150 species in my country, mainly distributed in the southwest region, especially in Yunnan. In addition to wild species, 10,000 horticultural species have been cultivated worldwide, such as bulbous begonias (B. tuberhybrida cv.), four-season begonias (B. cucullata cv.) and bamboo begonias (B. maculata cv. .) and so on have long been popular in the world. China's wild begonia resources are relatively rich, but few new varieties have been bred, and there are few characteristic species.

SUMMARY OF THE INVENTION: The object of the present invention is to provide a breeding method for new species of Begonia. For realizing the purpose of the present invention, technical scheme of the present invention is embodied like this:

A breeding method for a new variety of begonia, namely 'Beauty' begonia (B.'Meinü'), using the palm leaf begonia (B.hemsleyana JDHooker) as the female parent and the joyful begonia (B.deliciosaLind.et Fotsch.) as the male parent, Through artificial cross pollination, after sowing seedlings, it is bred from hybrid F ₁ individuals with white spots on the leaves.

Compared with the prior art, the present invention has the advantage that no similar varieties have been found in the prior art. The new variety of the present invention is very similar to its parent "pleasant begonia" (B. delicosa Lind. et Fotsch), but the plants are more upright, with more hairs, deeper division of leaves, and more lobes, so they are different from each other.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS: The substantive content of the present invention will be further described below in conjunction with the embodiments of the present invention, but the content of the present invention is not limited thereto.

Example 1:

Variety breeding method: 'Beauty' Begonia (B.'Meinü') is pollinated by artificial hybridization with B.hemsleyana JDHooker as the female parent and B.deliciosa Lind.et Fotsch. as the male parent. After sowing and raising seedlings, they are selected and bred from individuals of the _F1 generation of hybrids. Individuals of the _F1 generation were divided into two types: leaves with white spots and no spots. The former had better ornamental value and were screened out as new varieties. Through backcrossing, that is, Begonia pleats as the female parent and Begonia palmatum as the male parent, the characters of the offspring are the same as those obtained by crossing, so this variety is the F ₁ generation of hybrids of Begonia sylvestris and Begonia pleats. Same. The hybridization test was carried out in September 1998; in January 1999, seeds were collected; in March 1999, seedlings and seedlings emerged; in 2000, they bloomed for the first time.

Explanation of variety specificity, consistency, and stability: The specificity of the new variety lies in: the plants are relatively erect, the stems are many, thin, unbranched, and the leaves are lobed and covered with many white spots. F ₁ generation individuals showed the same traits except for leaf spots and no spots, and the new varieties were named after individuals with white spots on leaves, and the positive and negative comparison results were the same. The stability of the variety can be maintained by vegetative propagation, sowing propagation with F ₁ generation seeds, and screening cultivation.

Suitable areas for planting: It is most suitable for planting in mild climate areas. In high temperature and alpine areas, corresponding cooling and heating measures are taken to avoid high temperature burns and low temperature freezing damage. It is also necessary to maintain proper air humidity during cultivation. It is suitable for cultivation in greenhouses and shade sheds in botanical gardens, parks, nurseries and other places, and can also be planted in cool and humid places under the forest, both as potted plants and ground plants.

Because the aboveground stems of this variety are slender and slender; the leaves are not only lobed, but also covered with many white spots, which are more beautiful, so it is named "Beauty".

This species is a perennial rhizome evergreen herb. Plant height 35-60 cm. Rhizome short, branched. Aboveground stems grow in clusters, slender, unbranched, reddish-brown, sparsely covered with gray-white pilose. Internodes 3-10, 1-19 cm long, 4-8 mm thick. The leaves are small to medium-sized, the basal leaves are slightly larger, ovate-cordate, asymmetrical, 8-20(24) cm long, 5-18(20) cm wide. The ventral surface is green, sparsely covered with off-white short bristles, the main veins are slightly convex, and the network veins are absent. The back of the leaf is light green, with convex veins, and the hair is almost the same as the belly of the leaf. Palmately lobed 1/4-1/2, lobes (cleft teeth) 3-8, middle 1-3 lobes smaller, tail pointed, other cleft teeth acute or acute; leaf margin with sparse and short hard eyelashes; leaves Base parallel to opening slightly overlapping. Petiole dark green or dark reddish brown, 5-30 cm long, 2-5 mm thick, pilose and inconspicuous shallow ventral groove. Monoecious. Inflorescence born in the axils of 1-2 nodes at the top of the stem, 1 branch, often lower than the leaf surface. 1-2 rounds of dichasium cymes, 8-10 cm long, about 5 flowers, red buds and flowers. Pedicel red, male tepals 4, female tepals 5. Ovary 2-loculed, with 2 placental lobes per locule. Fruit green, with unequal 3 wings. The flowering period is from September to November.

The plants are upright and have strong disease resistance. The leaves are covered with many white spots and have high ornamental value. Focus on ornamental plant type and leaves.

It can be propagated by leaf cuttings, ramets and tissue culture, and it can also be propagated by hybrid F ₁ generation seeds and screened. Cultivation should be properly shaded and maintain a certain air humidity. It is suitable for cultivation and viewing in greenhouses and shade sheds in botanical gardens, parks, nurseries and other places, and can also be planted in cool and humid places under the forest, both as potted plants and ground plants. It is very suitable for indoor decoration in hotels, restaurants, offices and so on.

Variety Test Conditions:

The tests of the above-mentioned new varieties were all carried out in the shade shed. The canopy density in the shed is about 0.5, the annual average temperature is 17.5°C, and the lowest temperature is 0°C. The maximum daily temperature difference is 21°C, the relative humidity is 30%-85%, and the average is about 60%. In addition, the control cultivation experiment proved that the intensity of light has a great influence on the growth of the plants. When the canopy density is greater than 0.7, the plants grow weakly, appear short and thin, have few leaves and few flowers.

Claims (1)

1, a kind of breeding method of begonia (B.'Meinü'), it is characterized in that begonia palm leaf (B.hemsleyana JDHooker) is made female parent, happy begonia (B.deliciosa Lind.etFotsch.) is made male parent, by artificial After cross-pollination and sowing seedlings, it is selected from hybrid F ₁ generation individuals with white spots on the leaves.