A prominent feature in Figure 2 C– E is the apparent over-representation of the voxels around S-cone selective directions (90° and 270° in the hue angle).
In this study, we clearly identified crop genomic regions with opposing selective directions, as indicated by the QTL for seeds produced per seed sown (SPSS), the main fitness trait.
The voxels that were significantly modulated by different colors (Fig. 2A, rightmost panel), however, display 2 major peaks around S-cone selective directions in the hue cycle (90° and 270°) but are conspicuously absent around the L − M axis (0° and 180°).
Similar patterns of few fitness QTL with contrasting selective directions have been shown for sunflower (Baack et al. 2008) and slender wild oat (Latta et al. 2010), suggesting that it is not uncommon that there are crop genomic blocks that are negatively as well as blocks that are positively selected for in the wild habitat.
We found that the activity of 30% of V6A cells was modulated by the outward shift of covert attention, often in a direction-selective way, with half of the cells excited and half inhibited by the attentional shift.
The normal emittance of the proposed emitter is shown to be wavelength-selective and direction-insensitive.
This is suggested by the sentence following Eq. 7 of Appendix 4: "The performance of the combined motion estimator is superior to the original direction selective estimator whenever the latter [i.e., the direction selective estimator] has a nonzero correlation with the autocorrelator".
We identified mirror-symmetric pairs of clusters with equivalent mixed feature tuning, including four clusters [ 9 12] that were direction selective with a net preference for large, bright spots and six direction-selective clusters [ 1 6] with an overall preference for large, dark stimuli.
Furthermore, in agreement with a previous finding that the reduction of subjective motion blur during pursuit is direction selective [15], [16], we also found the temporal resolution improvement during pursuit was direction selective.
Direction selective ganglion cells (DSGCs) in the retina require GABAergic inhibition, mediated by GABAA receptors, for the discrimination of motion direction [1], [2], [3], [4].
