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Table 1 Regression ( R 2 ) values between hybrid index and phenotypic traits within and outside the hybrid zone

From: Speciation in Western Scrub-Jays, Haldane’s rule, and genetic clines in secondary contact

Trait

All

Transect

Core hybrid

Wing

0.04*

ns

ns

Tail

ns

ns

ns

Tarsus

ns

ns

ns

Bill length

ns

ns

ns

Bill depth

ns

ns

ns

Bill width

0.11***

ns

ns

Morph PC11

ns

ns

ns

Morph PC22

0.06**

ns

ns

Morph PC33

0.05**

ns

ns

Collar

0.38***

0.23**

ns

Vent

0.51***

0.46***

0.36***

Eyestripe

0.31***

0.25***

0.37***

  1. 1PC1 describes general size.
  2. 2PC2 describes a trade-off between body and bill size.
  3. 3PC3 describes a trade-off between bill length and bill width.
  4. ns = not significant, *p < 0.05, **p < 0.01, ***p < 0.001.
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BMC Ecology and Evolution

ISSN: 2730-7182

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