CAP
发表于 2025-3-21 17:33:27
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GUISE
发表于 2025-3-21 20:51:41
Definition and Some General Features,ity) denotes a condition in which unless specified otherwise, both pollen grains and ovules are nonfunctional and usually a certain amount of morphological and cytohistological deterioration may accompany it. The instances of selfincompatibility, in contrast, have functional parts of the flower and
GOAD
发表于 2025-3-22 04:29:34
Modes of Origin,ch greater importance to us are, however, the cases involving our familiar genetic materials. . (1940) reported a rather high frequency of male-steriles occurring among the artificially inbred populations of several species of . and in fact, he observed that smaller sized populations tend to favour
使痛苦
发表于 2025-3-22 07:43:57
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碎石头
发表于 2025-3-22 09:04:09
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discord
发表于 2025-3-22 14:25:28
Induction Experiments,ances and radiations on plants encountered pollen abortion as a conspicuous aftereffect. Insofar they might allow us to interpret various biochemical or physiological aspects of this phenomenon of male sterility, a reference would appear pertinent here.
提炼
发表于 2025-3-22 19:04:08
Utilization in Plant Breeding,reeder. An initial wave of enthusiasm starting from the success reported in onion and sorghum, stimulated several attempts in other crops as well and in fact, successful projects are already underway in maize, tomato, barley and sugarbeets. In Germany a commercial seed firm obtained patent rights fo
unstable-angina
发表于 2025-3-23 00:27:45
Evolutionary Significance, at least it has manifold evolutionary importance. A study of distribution patterns of the diverse sexual forms among both monomorphous and polymorphous groups is expected to throw some light on the intermediate steps in the evolution of dioecism from hermaphroditism if one might assume that dioecy
BAN
发表于 2025-3-23 03:08:19
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保守党
发表于 2025-3-23 09:29:04
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