桃金娘科昆zea pomifera的育种行为:自交不亲和、种内亲和和种间亲和。

Sexual Plant Reproduction Pub Date : 2010-09-01 Epub Date: 2010-02-11 DOI:10.1007/s00497-010-0133-0
T Page, G M Moore, J Will, G M Halloran
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引用次数: 8

摘要

为了研究澳大利亚特有匍伏灌木昆泽(Kunzea pomifera)的育种系统特征,对13个不同基因型的昆泽(Kunzea pomifera)进行了人工杂交,以阐明:(1)自交不亲和,(2)种内交亲和,(3)与双歧昆泽(K. ambigua)和石竹昆泽(K. ericoides)的种间交亲和。自交亲和性很低,花柱和子房花粉管的生长阻碍了自交受精。在不同基因型的金银花种内传粉后,38.4%的授粉花成果;花柱中相容花粉管的阻滞,阻止受精,导致本种的低坐果。对雌蕊亲本pomifera和雄蕊亲本K. ambigua的种间亲和性进行了研究,结果表明,每花授粉结实率(4.47)与种内杂交结实率(4.66)差异不显著。雌蕊亲本金葵与雄蕊花金葵杂交结果为0.037%,每花有0.0075粒种子。这两种植物之间的繁殖障碍在石竹花柱上表现得很明显,石竹花粉管的生长尖端膨胀并停止生长。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Breeding behaviour of Kunzea pomifera (Myrtaceae): self-incompatibility, intraspecific and interspecific cross-compatibility.

To examine breeding system characteristics of the endemic Australian prostrate shrub Kunzea pomifera, artificial hybridisations were undertaken using thirteen different genotypes of K. pomifera, to elucidate: (1) self-incompatibility, (2) intraspecific cross-compatibility in the species and (3) interspecific cross-compatibility with each of K. ambigua and K. ericoides. K. pomifera exhibited very low self-compatibility, with the barrier to self-fertilisation being prevention of pollen-tube growth in the style or ovary. Following intraspecific pollination amongst a number of different genotypes of K. pomifera, 38.4% of pollinated flowers developed fruit; arrest of compatible pollen-tubes in the style, preventing fertilisation, contributes to the low fruit set in this species. Interspecific compatibility was examined between K. pomifera (pistillate parent) and K. ambigua (staminate parent) where seed set per pollinated flower (4.47) was not significantly different from intraspecific crosses (4.66). In crosses between K. pomifera (pistillate parent) and K. ericoides as staminate plant, 0.037% of pollinated flowers produced fruit, with 0.0075 seeds per pollinated flower. Reproductive barriers between these two species were evident in the style of K. pomifera, where the growing tips of the K. ericoides pollen-tubes swelled and ceased to grow.

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来源期刊
Sexual Plant Reproduction
Sexual Plant Reproduction 生物-生殖生物学
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