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Joint International Conference on Long-term Experiments ...

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“Rigel” seed multiplicati<strong>on</strong> commenced with a 1000 plant, 200 m 2 spring transplanted<br />

plot grown in the UK in 1992 which yielded 25 kg seed. 14.5 ha of “Rigel” crops were<br />

sown in New Zealand in October 1992 and harvested oil and GLA c<strong>on</strong>tents were again<br />

much higher than “Merlin”. Unfortunately, yield data after 1990 are not available but<br />

Fieldsend (2003) reported yields of up to 1.87 t ha -1 from spring-sown “Rigel” in New<br />

Zealand in 1998 whilst in 1999 some “Rigel” crops yielded more than 2 t ha -1 (Scotia,<br />

commercial data). This cultivar was again awarded PVR and was the sole cultivar to be<br />

grown commercially for Scotia after 1994.<br />

GLA c<strong>on</strong>tent of oil (%)<br />

Seed oil c<strong>on</strong>tent (%)<br />

14<br />

13<br />

12<br />

11<br />

10<br />

9<br />

8<br />

29<br />

28<br />

27<br />

26<br />

25<br />

24<br />

1990 1991 1992 1993 1994 1995 1996 1997<br />

Year of harvest<br />

Figure 2: Seed oil c<strong>on</strong>tent and GLA c<strong>on</strong>tent of oil of overwintered crops of evening<br />

primrose harvested in New Zealand from 1990 to 1997. Cultivars are designated<br />

thus: circles: 421; triangles up: Paul/Peter; squares: Merlin; triangles down: Rigel.<br />

33

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