Method for hybridizing and breeding water dropwort

Abstract

The invention discloses a method for hybridizing and breeding water dropwort, and belongs to the field of water dropwort breeding. The method for hybridizing and breeding the water dropwort includes pollinating water dropwort female parents by the aid of male parent pollen on the 2nd-5th days of blooming of the water dropwort female parents bloom; harvesting hybrid seeds. The hybrid seeds of the water dropwort are further stored by the aid of sand, then germination is accelerated, and the hybrid seeds are high in germination rate. As indicated by stigma receptivity detection results, stigmas are high in receptivity on the 4th-5th days of blooming of the water dropwort and are non-receptive from the 1st day to the 2nd day of blooming and on the 6th day of blooming; as indicated by pollen activity detection results, the pollen of the water dropwort is high in activity from the beginning of blooming to 6h after the water dropwort blooms; as indicated by the results, female and male organs of the water dropwort not only are separated from one another in space domains, but also are separated from one another in time domains, and the water dropwort only can be fertilized and can set fruit under geitonogamy or xenogamy conditions. Emasculation can be omitted, and the method for hybridizing and breeding the water dropwort has the advantages of high fruit setting rate, obvious hybridization merits and the like. Besides, foundation can be laid for creating water dropwort resources and selectively breeding novel varieties.

Description

technical field [0001] The invention relates to a cress hybrid breeding method and belongs to the field of cress breeding. Background technique [0002] Cress (Oenanthejavanica D.C) is an aquatic perennial herb of the Umbelliferae family. It is eaten with its tender stems and petioles and has a delicious taste. In addition, cress has high medicinal value, economic value and ecological value. [0003] The flowers of cress are compound umbels, which are terminal or lateral on the stem. The flowers are small, the seed setting rate is low, the seeds are easy to fall off after maturity, difficult to harvest, and the seed germination rate is low, which seriously restricts the growth of seeds in production. use. At present, China mostly adopts asexual reproduction to reproduce the offspring of cress, which has a low probability of good variation, which is extremely unfavorable from the perspective of species evolution and adaptation to the environment; and although the good trait...

AI Technical Summary

Problems solved by technology

[0003] The flowers of cress are compound umbels, which are terminal or lateral on the stem. The flowers are small, the seed setting rate is low, the seeds are easy to fall off after maturity, difficult to harvest, and the seed germination rate is low, which seriously restricts the growth of seeds in production. use

At present, asexual reproduction is mostly used in China to reproduce the offspring of cress, and the probability of producing good mutations is low, which is extremely unfavorable from the perspective of species evolution and adaptation to the environment; and although the good traits of some varieties are maintained, the bad traits cannot be eliminated.

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