Today’s broccoli heads are much tighter and more uniform in shape than older varieties, which makes them look better and sell better in stores.

Scientific Claim

Modern hybrid broccoli has significantly higher head compactness (4.1) and uniformity (3.3) than landrace broccoli (2.0 and 2.2), reflecting selection for improved market quality.

Original Statement

“Head compactness was positively associated with cultivar release year (p < 0.01), ranging from 2.0 (sprouting broccoli) to 4.1 (Calabrese hybrids). Head uniformity ranged from 2.2 (Calabrese landrace) to 3.3 (Calabrese hybrid).”

From study:From landrace to modern hybrid broccoli: the genomic and morphological domestication syndrome within a diverse B. oleracea collection.

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

association

Can only show association/correlation

Assessment Explanation

The claim describes observed trait differences and correlations without asserting causation. 'Has' is acceptable as a descriptive comparison.

Evidence from Studies

Supporting (1)

From landrace to modern hybrid broccoli: the genomic and morphological domestication syndrome within a diverse B. oleracea collection.

Cross-Sectional Study

Scientists found that today’s broccoli was bred from older types to be more uniform and tightly packed for better looks and shelf life, even though it lost some genetic variety in the process.

Contradicting (0)

No contradicting evidence found

Source Study

From landrace to modern hybrid broccoli: the genomic and morphological domestication syndrome within a diverse B. oleracea collection.

Score: 37

DOI: 10.1038/s41438-020-00375-0

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