Central Arid Zone Research Institute, 342 003, Jodhpur, India.
Theor Appl Genet. 1996 Feb;92(2):278-80. doi: 10.1007/BF00223386.
The use of different sources of cytoplasmic male sterility (CMS) in hybrid seed production of pearl millet [Pennisetum glaucum (L.) R. Br.] is advocated to avoid possible disease epidemics occurring due to cytoplasmic uniformity. The effects of commercially unexploited, but potentially exploitable, sources of CMS, like A2, A3 and A4, on downy mildew [Sclerospora graminicola (Sacc.) Schroet] incidence were studied by using the disease incidence of isonuclear hybrids with male-sterile and fertile cytoplasm. The mean downy mildew incidence of hybrids carrying different male-sterile cytoplasm was similar to that of hybrids retaining the fertile cytoplasm. The cytoplasm accounted for only 0.6% of the total variation and its effect was non-significant; pollinators could explain most of the variation in determining the disease incidence of hybrids. This suggested that these male-sterile cytoplasms are not linked to downy mildew susceptibility and thus can be exploited commercially to broaden the cytoplasmic base of the male-sterile lines and, ultimately, of hybrids.
提倡在珍珠粟[Pennisetum glaucum（L.）R. Br.]杂交种子生产中使用不同来源的细胞质雄性不育（CMS），以避免因细胞质均一性而可能引发的疾病流行。通过使用具有不育和可育细胞质的同核杂种的疾病发病率，研究了商业上未开发但具有潜在可开发性的 CMS 来源，如 A2、A3 和 A4，对霜霉病[Sclerospora graminicola（Sacc.）Schroet]发病率的影响。携带不同不育细胞质的杂种的平均霜霉病发病率与保留可育细胞质的杂种相似。细胞质仅占总变异的 0.6%，其影响不显著；传粉媒介可以解释决定杂种发病的大部分变异。这表明这些不育细胞质与霜霉病易感性无关，因此可以商业上加以利用，以扩大不育系的细胞质基础，并最终扩大杂种的细胞质基础。
