. Contributions from the Laboratory of Plant Genetics. PARTIAL STERILITY IN CERTAIN PLANT HYBRIDS 335 I believe that the data have a decided value, and that the conclusions drawn from them are satisfactory from the standpoint of statistical theory. First, the pollen from 52 plants was examined microscopically. Repre- sentatives from all of the more distinctive types were included. The pollen was examined dry, in water and in glycerin. The general results are as follow: (1) Judging from the amount of pollen formed and from the percentage of aborted grains, it appears uncertain that any F2 plant
. Contributions from the Laboratory of Plant Genetics. PARTIAL STERILITY IN CERTAIN PLANT HYBRIDS 335 I believe that the data have a decided value, and that the conclusions drawn from them are satisfactory from the standpoint of statistical theory. First, the pollen from 52 plants was examined microscopically. Repre- sentatives from all of the more distinctive types were included. The pollen was examined dry, in water and in glycerin. The general results are as follow: (1) Judging from the amount of pollen formed and from the percentage of aborted grains, it appears uncertain that any F2 plants are more sterile. Figure 11.—At left, A7, rustica scabra; at right, F2 segregate, N. rustica humilis X N. panic- ulata, duplicating characters of N. rustica scabra. than the plants of the Fx generation. In nine plants out of 52 examined, the proportion of pollen formed and the proportion of grains apparently viable were comparable with the proportions found in Fx. The grains apparently viable were between 3 percent and 10 percent of the total. In one other plant, only aborted pollen grains were found, but it is assumed that this condition was not due wholly to heredity because the plant formed about 25 percent of the number of seeds expected normally when pollinated with sib pollen. Genetics 6 : Jl 1921. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bussey Institution. Boston : [s. n. ]
Size: 1780px × 1404px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherbostonsn, bookyear1
