Brassica juncea is an amphidiploid between

Brassica juncea is an amphidiploid between Correct Answer B. nigra and B. campestris

Brassica juncea is an amphidiploid between B. nigra and B. compestris.
Brassica juncea L. belongs to the mustard family and has numerous common names used, e.g., brown mustard, Chinese mustard, or oriental mustard.
Brassica juncea is an amphidiploid with 18 chromosomes having in its genetic system the A genome (Brassica campestris) and the 8-chromosome B genome (Brassica nigra). Considerable natural variability exists under the A genome.
Bissoy MCQ

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