Titlebook: Male Sterility in Flowering Plants; S. K. Jain Book 1959 Springer Science+Business Media Dordrecht 1959 Polle.plant breeding.plants.pollin

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978-94-015-1685-3Springer Science+Business Media Dordrecht 1959

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Definition and Some General Features,or pollen inviable and incapable of effecting fertilization under normal conditions. It is an obvious implication that the ovular fertility is completely or almost completely unimpaired in a male-sterile individual.

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Modes of Origin,echanism of the species in question”. In wellbuffered genetic materials, an equilibrium may have been set up so that factors causing instability of meiotic behaviour (., 1937) or of sex expression (., 1956) would be absent.

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Evolutionary Significance,thers in maize show with exactitude a genetic basis of the origin of dioecy (., 1940, 1942). On the contrary, the trigger found in case of . seems to illustrate the retrogession from dioecism to bisexuality. . (1958) has critically examined both of these cases on a comparative basis to show their re

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nd the basic principles we shall first consider the motion of a planar wall segment both without and then with Bloch lines. Following that we apply the same considerations to circular bubbles to gain an understanding of such concepts as bubble mobility, coercive force, dynamic deflection, velocity s