Page 178 - Breeding and regulatory opportunities, Renaud

Chapter 5

Phytochemical correlation to horticulture traits across trials

A correlation analysis was conducted for six horticulture traits, derived from

the ield study component of this research, Renaud et al. (2014), and the nine

phytochemicals across trials. The results indicated that greater head weight and

head diameter were signiicantly positively correlated with glucoraphanin and

negatively correlated with glucobrassicin, δ-tocopherol and the carotenoids.

Increasing days to maturity was positively correlated with glucoraphanin, and

negatively correlated to carotenoids. Head color was signiicantly correlated

with δ-tocopherol and the carotenoids, but not with glucosinolates or γ- and

α-tocopherol. Bead size and bead uniformity were positively correlated with

glucoraphanin, neoglucobrassicin and γ-tocopherol and negatively correlated

with glucobrassicin and the carotenoids.

Table 5.5 Correlations coeicients (r) for six horticultural traits and nine phytochemicals, calculated
using data standardized across trials. Correlation results include means from 23 cultivars, across eight

pair combinations of location (Maine/Oregon), season (Fall/Spring) and management system
(Conventional/Organic), 2006-2008a.

in
r ty n sic
t teminiin asl l l
hmer
orasicbrrororon e
igaloe
ifphasohehehehin
WeDity
CoizUnabrucpppntte
d d urid d Sd oroglcococoin
aro
aaataaaucucooooteaxCa
HeHeMHeBeBeGlGlNeδ-tγ-tα-tLuZeβ-

Head Weight

Head Diameter 0.81

Maturity

Head Color

Bead Size
0.63 0.69

Bead Uniformity 0.49 0.48

Glucoraphanin 0.47 0.44 0.43 0.63 0.51

Glucobrassicin -0.54 -0.50
-0.56 -0.64 -0.51

Neoglucobrassicin 0.58
0.48

δ-Tocopherol -0.55 0.49

γ-Tocopherol 0.43

α-Tocopherol

Lutein
-0.69 -0.65 -0.700.56 -0.41
0.55 -0.54

Zeaxanthin -0.64 -0.68-0.43-0.620.49 0.60 -0.42 0.95

β-Carotene
-0.48
-0.53 -0.540.59
0.50 -0.43
0.90 0.90

a For empty cells, r is
not signiicantly diferent from zero (P < 0.05).

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