The Association of Semisterile-1 in Maize with Two Linkage Groups.
In 1925 there appeared in one of the senior writer’s cultures of maize a few plants producing 50 percent aborted pollen. Subsequent examination of the ears borne by these individuals revealed that they likewise developed only one-half the normal number of seeds. Following BELLING’S (1914) application of the term to a similar condition in Stizolobium, the phenomenon was called semisterility. The pedigreed line to which the
Linkage between Brachysm and Adherence in Maize
3. .4295 .4176 .4060 .3947 .3837 .3731 .3627 .3526 .3428 .3333 4. .3241 .3151 .3063 .2978 .2895 .2815 .2737 .2661 .2587 .2515 5. .2445 .2377 .2311 .2247 .2184 .2124 .2065 .2007 .1952 .1897 6. .1844 .1793 .1744 .1695 .1648 .1602 .1558 .1515 .1473 .1432 7. .1392 .1353 .1316 .1279 .1244 .1209 .1175 .1143 .1111 .1080 8. .1050 .1021 .0993 .0965 .0938 .0912 .0887 .0862 .0838 .0815 9 . .0792 .0770 .0749 .0728 .0708 .0688 .0669 .0651 .0632 .0615 10 . 0598 .0581 .0565 .0549 .0534 .0519 .0505 .0491 .0477 .0464 11 . 0451 .0439 .0426 .0414 .0403 .0392 .0381 .0370 .0360 .0350 12. .0340 .0331 .0322 .0313 .0304 .0296 .0287 .0279 .0272 .0264 13.... . .0257 .0250 .0243 .0236 .0229 .0223 .0217 .0211 .0205 .0199 14.... .0194 .0188 .0183 .0178 .0173 .0168 .0164 .0159 .0155 .0150 15. .0146 .0142 .0138 .0134 .0131 .0127 .0123 .0120 .0117 .0113 16. .0110 .0107 .0104 .0101 .0098 .0096 .0093 .0091 .0088 .0086 17 . .0083 .0081 .0079 .0076 .0074 .0072 .0070 .0068 .0066 .0065 18. ... . .0063 .0061 .0059 .0058 .0056 .0055 .0053 .0052 .0050 .0049 19 . .0047 .0046 .0045 .0044 .0042 .0041 .0040 .0039 .0038 .0037 20 . 0036 .0035 .0034 .0033 .0032 :0031 .0030 .0029 .0029 .0028 21 . 0027 .0026 .0025 .0025 .0024 .0023 .0023 .0022 .0021 .0021 22.... . .0020 .0020 .0019 .0019 .0018 .0018 .0017 .0017 .0016 .0016 23 . 0015 .0015 .0015 .0014 .0014 .0013 .0013 .0013 .0012 .0012 24..... . 0012 .0011 .0011 .0011 .0010 .0010 .0010 .0010 .0009 .0009
Gill diseases of cultured salmonids in Ontario.
Between 1977 and 1981, the Fish Pathology Laboratory of the Ontario Veterinary College received 239 cases from trout farms of southern Ontario, 51 (21.3%) of which had diseased gills. Branchial lesions in 86.3% of these 51 cases were characterized by marked lamellar epithelial hyperplasia with epithelial hypertrophy and lamellar fusion. Filamentous bacteria were seen on the surface of the branchial filaments and lamellae in 68.6% of the cases. Our observations highlight the importance of gill diseases as a production problem of farmed salmonids in southern Ontario.