self-incompatibility

a condition in plants where certain types of pollen will not form pollen tubes when deposited on the female stigma, thus preventing fertilization. Self-incompatibility prevents self-fertilization and promotes heterozygosity (the mixing of allelic forms). The system is controlled by an S locus with many alleles (see MULTIPLE ALLELISM), and pollen with the same allele as in the stigma will not germinate to form a pollen tube. This is shown in Fig. 279. Self-incompatibility mechanisms are much used to produce HYBRID plants (e.g. various Brassica crops). See also COMPATIBILITY.

单词	self-incompatibility
释义	self-incompatibility self-incompatibility [¦self ‚in·kəm‚pad·ə′bil·əd·ē] (botany) Pertaining to an individual flower that cannot complete fertilization with its own pollen. self-incompatibility self-incompatibility a condition in plants where certain types of pollen will not form pollen tubes when deposited on the female stigma, thus preventing fertilization. Self-incompatibility prevents self-fertilization and promotes heterozygosity (the mixing of allelic forms). The system is controlled by an S locus with many alleles (see MULTIPLE ALLELISM), and pollen with the same allele as in the stigma will not germinate to form a pollen tube. This is shown in Fig. 279. Self-incompatibility mechanisms are much used to produce HYBRID plants (e.g. various Brassica crops). See also COMPATIBILITY. AcronymsSeeSI
随便看	family winemakers of california family winteraceae family wise error rate family xanthorrhoeaceae family xantusiidae family xenicidae family xenopodidae family xenosauridae family xiphiidae family xylariaceae family xyridaceae family, youth and community services family zamiaceae family zannichelliaceae family zapodidae family zeidae family zingiberaceae family ziphiidae family zoarcidae family zosteraceae family zygnemataceae family zygophyllaceae famine famine and temperature famine dropsy