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Broccoli phytochemical content
A 7.00
F1 hybrids
6.00 Open pollinated
*
W)
D
5.00 **
/g
mol
4.00 μ
n (
3.00 atio
ntr
2.00 ce
1.00 ***
on
C
0.00
B 7.00 Early Maturing
6.00 Medium Maturing
W)
5.00 Late Maturing
g D
**
ol/
4.00 μm
n (
3.00 io
rat
2.00 * * *
ent
*
nc
1.00 Co
0.00
Figure 5.2 A. Mean phytochemical content of broccoli F1 hybrids versus open pollinated cultivars, and
B. Mean phytochemical content of early, mid- and late-maturing cultivars grown across all trials at two
locations (Maine and Oregon), in two seasons (Fall and Spring) and in two management systems
(Conventional and Organic) and conventional management systems. See Table 1 for key to cultivar F1
hybrid versus open pollinated classiication and maturity classiication.
Signiicance (* = P < 0.05, ** = P < 0.01, *** = P < 0.001).
2
1.8
1.6
1.4
1.2
1
0.8
0.6
y = -0.0085x + 18.393
0.4 R2 = 0.2181
0.2
0
1970 1975 1980 1985 1990 1995 2000 2005 2010
Figure 5.3 Regression of broccoli loret glucobrassicin concentrations on date of cultivar release for 23
cultivars grown across all trials in two locations (Maine and Oregon), in two seasons (Fall and Spring), in
two management systems (Conventional and Organic), 2006-2008.
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