Linear Regression

Slope

R²

L.c. cultivar No. vs. L.c. species No.

0.31

0.88

S.c. cultivar No. vs. S.c. species No.

0.55

0.94

L.c. cultivar No. vs. S.c. cultivar No.

0.36

0.76

Columbian cultivar No. vs. pre-columbian cultivar No.

L.c. = Long cycle; S.c. = Short cycle

0.41

0.76