RELATIONSHIPS BETWEEN THE DURATION OF PHASES IN THE PRE-ANTHESIS LIFE-CYCLE OF SPRING BARLEY
RELATIONSHIPS BETWEEN THE DURATION OF PHASES IN THE PRE-ANTHESIS LIFE-CYCLE OF SPRING BARLEY
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DOI：
10.1071/ar9820917
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发表时间：
1982-01-01
影响因子：
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通讯作者：
FELLOWES, G
中科院分区：
文献类型：
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作者：
APPLEYARD, M;KIRBY, EJM;FELLOWES, G
以6棱和2棱春大麦品种的2个杂交后代为材料，研究了穗的发育和穗的生长。原基发生率在亲本和子代之间没有差异。穗分化和穗生长的持续时间在基因型之间存在差异，并且这些阶段的持续时间之间存在很强的负相关。穗分化的持续时间与叶数相关，从播种到开花的生活史长度也是如此。小穗的存活率与小穗原基发生的数量有关。而小穗原基多的穗中，小穗原基存活形成籽粒的比例较少。这可能是由于耳朵资源的竞争。最佳的穗大小和生命周期持续时间可以通过在生命周期的组成阶段进行适当的持续时间育种来实现。
Ear development and ear growth were studied in the progeny of 2 crosses between a 6-row and 2 2-row spring barley varieties. There were no differences in the rates of primordium initiation among the progenies and parents. Duration of ear initiation and ear growth varied among the genotypes, and there was a strong negative correlation between the duration of these phases. Duration of ear initiation was correlated with the number of leaves, as was the length of life cycle from sowing to anthesis. Survival of spikelets was related to the number of spikelet primordia initiated. However, the proportion of spikelet primordia that survived to form grains was less in ears with most spikelet primordia. This may be due to competition for resources in the ear. Optimal ear size and life-cycle duration may be achieved by breeding for appropriate durations of the component phases of the life cycle.