Induced polyploidization in Brassica campestris L. (Brassicaceae)

Area of Science:

• Plant breeding
• Genetics
• Crop science

Background:

• Polyploidization can enhance crop traits and environmental adaptability.
• Synthetic polyploids offer a route to novel crop varieties.

Purpose of the Study:

• To achieve autotetraploids of Brassica campestris L. through synthetic polyploidization.
• To evaluate the effectiveness of different colchicine treatment methods.
• To characterize the cytomorphological changes in induced autotetraploids.

Main Methods:

• Synthetic polyploidization of Brassica campestris L. using colchicine.
• Seed and seedling treatment methods were employed.
• Cytomorphological analysis, including stomata size, pollen diameter, and genome size, was performed.

Main Results:

• Autotetraploids were successfully obtained via seedling treatment; seed treatment was ineffective.
• Significant changes in morphological traits were observed, including increased stomata and pollen size, and larger flowers.
• Reduced plant height, leaf dimensions, and stomata frequency were noted in autotetraploids.
• Cytological investigations confirmed genome doubling, and pollen fertility was evaluated.

Conclusions:

• Seedling treatment with colchicine is an effective method for inducing autotetraploidy in Brassica campestris L.
• Induced autotetraploids exhibit distinct cytomorphological characteristics compared to diploids.
• This study provides a foundation for developing polyploid crops with improved traits and stress tolerance.