Question

Why is vivipary an undesirable character for annual crop plants?

Answer 1

Vivipary happens in plants when seeds or embryos begin to develop before detaching from their parent. Cormlets grow in the axils of the inflorescences of several Iridaceae and Agavoideae plants. They have virtually an entire season's start over falling seeds in the fall, if conditions are favourable.

Complete answer:
For example, in some mangrove species, the seed germinates and grows on its own while still attached to its parent. Some species' seedlings are spread by currents if they fall into water, whereas others have a thick, straight taproot that usually penetrates mud when they fall, thereby establishing the seedling.
The mangrove plantlets, in contrast to the vegetative reproduction examples stated above, are real seedlings created via sexual reproduction.
The seeds of some plants, such as jackfruit, citrus, and avocado, can be found already germinated while the fruit ripens; technically, this is not vivipary, but the moist and humid circumstances produced by the fruit imitate a wet soil, which favours germination. The seeds, on the other hand, can germinate in damp soil.
It's because the seeds can't be kept for the following season in normal conditions. Annual plants have a one-season life cycle, in which seeds are created, germinated, and the mature plant is produced, and then dies during the same season.
Seeds or spores germinate in situ on mature plants before being discharged in vivipary, which is not possible with annual plants because mature plants can not store seeds. This is due to the fact that it died after seed production.

Note:
Vivipary refers to the reproduction of embryos, such as shoots or bulbils, rather than sprouting from a dropped, dormant seed, as is the case with plants.
Pseudovivipary A few plants are pseudoviviparous, meaning they can reproduce asexually by forming new plantlets in their spikelets rather than reproducing with seeds.