| 翻訳と辞書 |
| Cytoplasmic male sterility ： ウィキペディア英語版 |
Cytoplasmic male sterility
Cytoplasmic male sterility is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions. Male sterility is the failure of plants to produce functional anthers, pollen, or male gametes.
==Background==
The first documentation of male sterility was by Joseph Gottlieb Kölreuter, who observed anther abortion within species and specific hybrids. Cytoplasmic male sterility has now been identified in over 150 plant species.〔Schnable PS, RP Wise (1998) The molecular basis of cytoplasmic male sterility. Trends in Plant Science, 3(5): 175-180.〕 It is more prevalent than female sterility, either because the male sporophyte and gametophyte are less protected from the environment than the ovule and embryo sac, or because it results from natural selection on mitochondrial genes which are maternally inherited and are thus not concerned with pollen production. Male sterility is easy to detect because a large number of pollen grains are produced and are easily studied. Male sterility is assayed through staining techniques (carmine, lactophenol or iodine), while detection of female sterility is by the absence of seeds. Male-sterile plants may be propagated, since they can still set seed, while female-sterile plants cannot. Male sterility can arise spontaneously via mutations in nuclear and/or cytoplasmic genes.
Male sterility can be either cytoplasmic or cytoplasmic–genetic. Cytoplasmic male sterility (CMS) is caused by the extranuclear genome (mitochondria or chloroplast) and shows maternal inheritance. Manifestation of male sterility in CMS may be controlled either entirely by cytoplasmic factors or by interaction between cytoplasmic and nuclear factors.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Cytoplasmic male sterility」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|