. Bulletin of the Department of Agriculture. Agriculture; Agriculture. IliTHERITANCE OF WAXY ENDOSPERM IF MAIZE. 79 , which is slightly in excess of five times the probable error. The correlation of is rather close to the expected where a plant heterozygous for two color factors is self-pollinated, but the percentage of white seeds, , precludes this explanation. Fortunately^ another ear borne on the same plant was pollinated by a plant grown from a homozygous white waxy seed. If ear No. 1796, deviating from the expected correlation of by five times the probable er
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. IliTHERITANCE OF WAXY ENDOSPERM IF MAIZE. 79 , which is slightly in excess of five times the probable error. The correlation of is rather close to the expected where a plant heterozygous for two color factors is self-pollinated, but the percentage of white seeds, , precludes this explanation. Fortunately^ another ear borne on the same plant was pollinated by a plant grown from a homozygous white waxy seed. If ear No. 1796, deviating from the expected correlation of by five times the probable error, represents but a chance fluctuation from this correlation, then the first ear of this same plant should, when crossed with white waxy, produce an ear with a correlation approximating The ear representing this cross is ear No. 1795. (Table XXXIX.) The correlation found was ±, certainly not an approximation of These correlations show that the two ears of the plant were pro- ducing the same ex- cess of gametes bearing colored waxy and white horny genes. The relations of these ears are shown in figure 11. Since the male parent of ear No. 1795 was a homozy- gous recessive, the zj'gotic ratio ob- served on this ear is also the gametic ratio of the female gametes within the range of chance fluctuation. To determine the gametic ratio of this ear as accurately as possi- ble the sum of the two reduplicated groups was divided by the sum of tlie nonreduplicated groups and the gametic ratio found to be to 1, or 3 to 2. The expected correlation on an ear the result of self-pollinating a plant with the gametic ratio of 3-2-2-3 is Ear No. 1796 is the result of self-pollinating the plant which bore ear No. 1795 with the above gametic ratio. The observed correlation on ear No. 1796 is , which deviates from a correlation by ±, the deviation being insignificant. The plant, then, which producfd ears Nos. 1795 and 1796 may with propriety be c
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