defuse
发表于 2025-3-30 09:37:15
Vorbereitende Jahresabschlussbuchungen,very useful in plant breeding programmes. Through a single step from one generation to another, individuals carrying defect allels are systematically eliminated, whereas traits of interest can be fixed homozygously in the progeny. Moreover, microspore cultures can be coupled with genetic transformation techniques.
你正派
发表于 2025-3-30 14:11:26
What may be the significance of polysiphony in , ?,en grain produces only one pollen tube. Other pollen, such as that of some species of the families Malvaceae, Cucurbitaceae and Campanulaceae are polysiphonous (Steffen 1963), each grain emitting more than one pollen tube.
受辱
发表于 2025-3-30 19:30:32
Sexual dimorphism and stamen development in the dioecious white campion,llaporta and Calderon-Urrea 1993). Most of the plants used as model have hermaphrodite flowers, which makes the cloning of genes expressed specifically during either male or female reproductive organ development difficult.
Misgiving
发表于 2025-3-31 00:24:15
Monitoring sporophytic development of individual microspores of barley (, L.),very useful in plant breeding programmes. Through a single step from one generation to another, individuals carrying defect allels are systematically eliminated, whereas traits of interest can be fixed homozygously in the progeny. Moreover, microspore cultures can be coupled with genetic transformation techniques.
杠杆
发表于 2025-3-31 04:53:53
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态学
发表于 2025-3-31 07:23:49
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带来的感觉
发表于 2025-3-31 11:38:35
,Das System der doppelten Buchführung,reading over the whole microsporocyte surface. During cytokinesis, which completes meiotic division, callose is also secreted between the four adjacent cells of the newly formed tetrad, contributing to the formation of the so-called “special callose wall”(Bhandari 1984).
fodlder
发表于 2025-3-31 16:24:57
Vorbereitende Jahresabschlussbuchungen,s of the vegetative cell. The formation of the pollen tube is central to the sexual reproduction of higher plants as it allows transport of the male gametes (sperm cells) through the maternal tissues to the embryo sac containing the egg cell.
阴谋
发表于 2025-3-31 18:24:28
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Spina-Bifida
发表于 2025-3-31 23:04:41
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