Breeding method for seed-shell-free Cucurbita maxima parents and seed-shell-free Cucurbita maxima parent variety

Abstract

The invention discloses a breeding method for seed-shell-free Cucurbita maxima parents and a seed-shell-free Cucurbita maxima parent variety. The breeding method comprises: carrying out generation-adding purification on collected and finished seed-used Cucurbita maxima variety resources; hybridizing different homozygous lines having far geographical relationship after the generation-adding purification, and treating with a plasma physical mutagen nitrogen ion at a dose of 2500-3000 Rad so as to induce the variation of the seed-used Cucurbita maxima variety; carrying out multi-generation planting purification on the selected variant seed-shell-free Cucurbita maxima mutant, and carrying out test cross identification to fine the seed-shell-free Cucurbita maxima mutant with the genetic character controlled by a recessive single gene; and carrying out hybridization and backcrossing transformation on the selected seed-shell-free Cucurbita maxima mutant and a large variety of seed-used Cucurbita maxima parents with seed shell to breed a series of seed-shell-free Cucurbita maxima parents.

Description

technical field [0001] The invention relates to a breeding method of Indian squash parents and varieties without seed shells. technical background [0002] Pumpkin is one of the earliest ancient crops cultivated by humans. There are many types and varieties of pumpkins, and the shapes, sizes, and qualities of fruits are different, and the colors are colorful. The characteristics of diversity among cultivated plants are very prominent. Pumpkin has strong disease resistance and stress resistance, wide adaptability, high yield, easy cultivation, and storage resistance of mature fruits. It is widely planted in various parts of our country. [0003] In Northeast my country, Northwest China, North China and other regions, the annual cultivation area of ​​pumpkin for seeds is nearly 3-5 million mu, which is mainly aimed at harvesting pumpkin seeds, and it is a major local economic crop. With the development of my country's economy and the continuous improvement of people's living ...

AI Technical Summary

Problems solved by technology

Consumers have a great demand for shelled pumpkin kernels, and all the pumpkin kernels sold in the market are obtained by manual peeling, and the cost is very high

[0004] At present, the production of pumpkin seeds in my country still mostly has seed shells, and there are also a small amount of varieties that use seedless shells (naked kernels) Chinese pumpkin (Cucurbit moschata) and seedless shells (naked kernels) zucchini (Cucurbit pepo) to produce seedless shells ( naked kernel) pumpkin seeds, but the seeds are generally small, and the export profit is not high