. Journal of genetics. the even rows of seedon the parent ear (p. ). In the present experiments the offspringwere as follows:— TABLE 111. Rows IB IIH LH/RH Per cent. LH Odd ... 867 615 1-410 .58-43 Even ... 2702 1942 1-391 58-19 Total 3569 2557 1-396 58-26 The totals obtained for all the varieties of two-rowed Barley studiedup to the present are as follows:—^11,185 LH, 7980 RH. RatioLH/RH =14,016. Percentage LH = 58-3Q2. 1 Compton, 1910, p. Ihiil. p. 499. R. H. COMPTON 57 Six-Rowed Barley. A few sowings were made with Hordewm hexastichum, var. pyrand-datum. In this species all three
. Journal of genetics. the even rows of seedon the parent ear (p. ). In the present experiments the offspringwere as follows:— TABLE 111. Rows IB IIH LH/RH Per cent. LH Odd ... 867 615 1-410 .58-43 Even ... 2702 1942 1-391 58-19 Total 3569 2557 1-396 58-26 The totals obtained for all the varieties of two-rowed Barley studiedup to the present are as follows:—^11,185 LH, 7980 RH. RatioLH/RH =14,016. Percentage LH = 58-3Q2. 1 Compton, 1910, p. Ihiil. p. 499. R. H. COMPTON 57 Six-Rowed Barley. A few sowings were made with Hordewm hexastichum, var. pyrand-datum. In this species all three flowers produced at each notch of thespike are hermaphrodite and set seed. Thus there are three odd andthree even rows on each ear. The three rows in each case are called left, middle, and right : that row being called left which istowards the left hand when the ear is held upright with the middlerow towards the observer. Diagram 2, which is partly ground-plan,partly elevation, will make this convention clear. QQO. Diagram 2. The three odd rows in several ears gave in all 55 LH and 45 RHseedlings: the ratio LHjRH being 1-22 (% LH = 55). Exactly thesame ratio was given by the otispring of the three even rows; thenumbers being 60 LH, and 49 RH. In Table IV, therefore, the two TABLE IV. Eows LH RH LHIRH Per cent. LH Left 60 46 1-304 56-6 Middle 87 76 1-145 53-4 Eight 71 48 1-479 59-7 Total 218 170 1-282 55-98 left rows—odd and even—are added together, and the same is donefor the middle and right rows respectively. Thus, as in the two-rowed varieties, there is an excess of left-handed offspring from all positions on the spike. The numbers studied 58 Study of Right- and Left-Handedness are rather restricted, so that the ratios cannot be considered exact; andthe discrepancies from the average given by individual rows are wellwithin the limits of probable error. We may conclude with a certaindegree of safety that the position of the seed on the ear has no effectupon the method
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