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首页> 外文期刊>Bioenergy research >Miscanthus Clones Display Large Variation in Floral Biology and Different Environmental Sensitivities Useful for Breeding
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Miscanthus Clones Display Large Variation in Floral Biology and Different Environmental Sensitivities Useful for Breeding

机译：芒草无性系显示出较大的花卉生物学变异和对育种有用的不同环境敏感性

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摘要

A wider range of Miscanthus varieties is required to develop Miscanthus clones that are suitable for bioenergy production. For this reason, breeding programs need to be initiated using knowledge regarding the genetic influence on floral biological traits. The objective of the present study was to characterize the genotypic variation in flowering and panicle architecture traits in Miscanthus by studying (i) the clone effect on these traits and (ii) the clone sensitivity to environmental conditions. The flowering traits characterized were date of panicle emergence, date of flowering onset, and interval between these two traits. The panicle architecture traits characterized were total panicle length, longest panicle raceme size, raceme number per panicle, floral density, and total flower number per panicle. Eight clones were studied in a greenhouse under four environmental conditions including two day lengths (an 8-h short day length and a natural day length) and two temperature treatments (warm and cool). Miscanthus clones showed large differences in flowering and panicle architecture traits. Moreover, day length appeared to be the most important environmental factor creating differential clone sensitivities for the panicle emergence and the onset of flowering in contrast to temperature factor for the total flower number per panicle. In addition, the behavior of the clone Sacc was in contrast with that of the other clones for most of the traits studied. This knowledge will be useful to optimize the synchronization of flowering between Miscanthus clones for more successful breeding programs.
机译：开发适用于生物能源生产的芒草克隆需要广泛的芒草品种。因此，需要使用有关遗传对花卉生物学性状影响的知识来启动育种程序。本研究的目的是通过研究（i）克隆对这些性状的影响和（ii）克隆对环境条件的敏感性，来表征芒草开花和穗构型性状的基因型变异。表征的开花性状为穗出芽的日期，开花开始的日期以及这两个性状之间的间隔。穗构型特征是穗总长，穗总外消旋体最长，每穗总外消旋数，花密度和每穗总花数。在温室中的四个环境条件下研究了八个克隆，包括两个天长（8小时短日长和一个自然天长）和两个温度处理（温暖和凉爽）。芒草无性系在开花和穗构型特征上显示出很大的差异。此外，天长似乎是最重要的环境因素，与穗的总花序数的温度因子相反，它对穗的出现和开花的开始产生不同的克隆敏感性。另外，对于大多数研究的性状，克隆Sacc的行为与其他克隆的行为相反。该知识对于优化芒草无性系之间的开花同步，以实现更成功的育种程序将非常有用。

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