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Books > Science & Mathematics > Biology, life sciences > Zoology & animal sciences
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Male Sterility in Higher Plants (Paperback, Softcover reprint of the original 1st ed. 1988)
Loot Price: R4,826
Discovery Miles 48 260
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Male Sterility in Higher Plants (Paperback, Softcover reprint of the original 1st ed. 1988)
Series: Monographs on Theoretical and Applied Genetics, 10
Expected to ship within 10 - 15 working days
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Total price: R4,846
Discovery Miles: 48 460
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" . . . . . . Nature has something more in view than that its own
proper males should fecundate each blossom. " Andrew Knight
Philosophical Transactions, 1799 Sterility implicating the male sex
solely presents a paradoxical situation in which universality and
uniqueness are harmoniously blended. It maintains a built-in
outbreeding system but is not an isolating mechanism, as male
steriles, the "self-emasculated" plants, outcross with their male
fertile sibs normally. Both genes (nuclear and cytoplasmic) and
environment, individually as well as conjointly, induce male
sterility, the former being genetic and the latter nongenetic.
Genetic male sterility is controlled either exclusively by nuclear
genes (ms) or by the complementary action of nuclear (lr) and
cytoplasmic (c) genes. The former is termed genic and the latter
gene-cytoplasmic male sterility. Whereas genic male sterility
exhibits Mendelian inheritance, gene-cytoplasmic male sterility is
non-Mendelian, with specific transmissibility of the maternal
cytoplasm type. Genetic male sterility is documented in 617 species
and species crosses com prising 320 species, 162 genera and 43
families. Of these, genic male sterility occurs in 216 species and
17 species crosses and gene-cytoplasmic male sterility in 16
species and 271 species crosses. The Predominance of species
exhibiting genic male sterility and of species crosses exhibiting
gene-cytoplasmic male sterility is due to the fact that for the
male sterility expression in the former, mutation of nuclear genes
is required, but in the latter, mutations of both nuclear and
cytoplasmic genes are necessary."
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