A method for improving the efficiency and quality of catalpa artificial cross breeding

Abstract

The invention discloses a method for improving the efficiency and quality of artificial cross-breeding of catalpa bungei, relating to the field of forest breeding. According to the method, a traditional artificial pollinating mode of dipping or sprinkling pollen onto pistil stigma is changed, the campanulate petal on the same inflorescence can be easily removed by combining the characteristic thatthe raceme of catalpa bungei is arranged in a corymbose shape at the optimal moment that the pistil stigma is slightly opened and has transparent mucus on the surface, but the style pollination activity is not influenced, the pistil stigma on the same inflorescence is collected to ensure that each to-be-pollinated stigma is uniformly dipped with pollen in a container, the pollination work for thestigmas on the same inflorescence can be completed in one time quickly and efficiently, so that the work efficiency and pollination quality of pollination can be improved, the pollination success rate and fruit setting rate can be remarkably improved; excessive pollen is shaken off into a container by slightly shaking the styles after pollination is completed, so that the pollen usage is saved, and the pollen harvesting cost is reduced. The method is simple in operation, is time saving and labor saving, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of tree breeding, in particular to a method for improving the efficiency and quality of catalpa artificial cross breeding. Background technique [0002] Catalpa bungei belongs to the Bignoniaceae family Catalpa Scop. It is a deciduous and tall tree. It is native to my country and has strong adaptability. It is mainly distributed in Henan, Hubei, Anhui, Shandong, Shanxi and other provinces. , has a long history of cultivation, and is a precious and high-quality timber tree species traditionally cultivated in my country and a famous garden ornamental tree species. However, there are very few natural wild plants. Within its distribution range, except for a small number of natural forests with multiple generations of germination in a few places, most of them are artificially cultivated "surrounding" trees. Catalpa is an insect-borne flower, autoflowering is sterile, probably due to the lack of pollinators, it is difficult...

AI Technical Summary

Problems solved by technology

Catalpa is an insect-borne flower, autoflowering is sterile, probably due to the lack of pollinators, it is difficult to pollinate and bear fruit in a natural state

[0003] In order to solve the problem of catalpa sterility, lack of pollinators, and inability to pollinate and bear fruit in the natural state, scholars at home and abroad have tried to carry out artificial hybrid breeding experiments of catalpa

In the past, catalpa hybridization considered how to make the pollen fall on the stigma of the catalpa. For example, the artificial pollination of the catalpa commonly used in the past mostly used artificial point pollination (use a brush or rubber to pick up the anther and apply pollen to the pistil stigma, or hold the male flower that is about to loose pollen) Apply pollen to the stigma of the pistil) (Zhao Kun, 2011; Wang Junhui, 2012), time-consuming, laborious and inefficient

Some people also collect catalpa anther (powder) in advance, then stir the anther (powder) in pure water evenly, configure it into a pollen solution, and then spray the pollen solution on the pistil stigma with a watering can. Since the flowers of Catalpa chinensis are bell-shaped, and the stigma of the pistil is in the bell-shaped flower, the pollen solution is not easy to touch the stigma, the fruit setting rate is low (Hao Mingzhuo, 2008), and pollen waste is serious

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