Page 136 - Breeding and regulatory opportunities, Renaud

Chapter 4

Figure 4.1 Comparison of broccoli cultivars for average head weight (g). A. grown across all trials in two

trial locations (Maine & Oregon) (2006-2008). B. between seasons (Fall/Spring) across trials (2006-2008).
C. between two management systems (Organic versus Conventional) across all trial locations and

seasons (2006-2008), and D. comparing performance in (Maine/Oregon) across both seasons (Fall/
Spring) and management systems (conventional/organic) and years (2006-2008).

Horticulture trait means

Head diameter demonstrated the same pattern as head weight with broccoli

from Oregon Fall trials having signiicantly larger head size than those from

Spring trials (Table 4.4). Days to maturity for broccoli cultivars grown in Fall trials

in Oregon (average 76 days) were signiicantly longer than in Spring (average

58 days) trials, whereas in Maine the days to maturity for Fall (74 days) were

comparable to Oregon while the results of the Spring trials for Maine (91 days)

were longer than Oregon. Bead size ranking for Fall trials averaged 5.2 compared

to 6.4 in Spring trials in both locations, indicating larger beads were observed

in Fall trials compared to Spring in both Locations and Management systems.

The same pattern was demonstrated for bead uniformity. Hollow stem had the

highest incidence in Oregon Fall, while Oregon Spring and Maine trials were

comparable. Plant height for broccoli cultivars grown in Oregon Fall trials were

signiicantly taller than the Oregon Spring trials and Maine trials across Seasons,

which agrees with the Oregon Fall head weight results (Table 4.4).

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