Secondary pedigree breeding method for breeding black peel and fruit size of white gourd-hairy squash hybrid

Abstract

The invention discloses a secondary pedigree breeding method for breeding black peel and fruit size of a white gourd-hairy squash hybrid. The method comprises the following steps: (1) sexually hybridizing a black-peel white gourd and a hairy squash to obtain a generation F1; (2) selfing a group of the generation F1 in the step (1) to obtain a group plant of a generation F2, then selecting 4-6 kg of a black peel fruit plant to self, repeatedly selfing for generations to obtain a stable selfing line; (3) sexually hybridizing the black peel fruit plant in the stable selfing line in the step (2) and the hairy squash to obtain a generation F1; (4) selfing a group of the generation F1 in the step (3) to obtain a group plant of a generation F2, then selecting 2-3 kg of the black peel fruit plantto self, and repeatedly selfing for generations to obtain a stable selfing line. According to the breeding method, the bred small black peel white gourd selfing line (the genetic constitution of the hairy squash is 75%, and the genetic constitution of the black-peel white gourd is 25%) requires a small group of the generation F2, so that the cost of field plantation for breeding and the breeding cost are reduced, the bred selfing line is a genetic mixture of the hairy squash and the black peel white gourd and combines the advantages of the two.

Description

technical field [0001] The invention relates to the field of breeding, in particular to a secondary pedigree breeding method for winter melon with black skin and fruit size, which selects the pedigree method. Background technique [0002] Zucchini is also known as hairy melon and pumpkin. It is an annual climbing herbaceous plant belonging to Cucurbitaceae, which is a variety of wax gourd. Zucchini is native to southern my country and is suitable for growing in places with higher temperatures and stronger sunlight. It is one of the specialty vegetables of our country. Zucchini roots are stronger, but weaker than squash. The stems are sprawling, with five edges, and the axillary buds of the stem nodes will have lateral tendrils, so the branching force is strong. At the beginning of the vine, there are tendrils at each stem node, and the tendrils are branched, and later there are flower buds, which differentiate into male flowers or female flowers. The fruit is small, sli...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a secondary pedigree selection method for winter melon peel black and fruit size, so as to overcome the disadvantage that the F2 population needs to plant a large number of plants in the selection process

Images