Why is there no seed in seedless red grapes

Seedless red grapes have no seeds because the development of seeds is inhibited through artificial breeding techniques, and they belong to natural variation or hybrid breeding varieties. There are three main cultivation methods for seedless red grapes: natural parthenocarpy, triploid sterility, and hormone treatment.

1. Natural parthenocarpy

Some grape varieties are born with the characteristic of parthenocarpy, and the pistil can swell and form fruit without pollination. This type of seedless red extract is cultivated by screening natural mutant plants, and the fruit is completely free of seeds and has a high sweetness. Seedless white grapes grown in Xinjiang and other regions of China belong to this category, with crisp and tender flesh that does not require hormone intervention.

2. Triploid sterility

A red variety with triploid chromosome composition through hybridization will experience a delay in seed development. This type of seedless red grape requires first crossing diploid and tetraploid grapes to obtain triploid plants, and then propagating through cuttings. Although triploid fruits may have small seed coat traces, there is no obvious graininess when consumed, such as summer black grapes and other varieties.

III. Hormone Treatment

Spraying gibberellin and other plant hormones on common diploid red extract can block the normal formation of seeds after pollination. The seedless red fruit cultivated by this method has larger seeds, but strict control of hormone concentration and time is required. This technique is commonly used in Japanese Haruho grapes, where only undeveloped white soft seeds remain in the mature fruit.

Seedless red extract is suitable for direct fresh consumption or making fruit plates. Its flesh is delicate and easy to eat. When selecting, pay attention to the plump and wrinkle free fruit. It is recommended to refrigerate and consume as soon as possible when storing. Due to the high sugar content, diabetes patients should control their intake. Soaking in light salt water before consumption can effectively remove surface pesticide residues. It is recommended for children to remove the skin to avoid choking risks.