Relationship between fruiting efficiency and grain weight in durum wheat
Relationship between fruiting efficiency and grain weight in durum wheat
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DOI：
10.1016/j.fcr.2015.03.009
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发表时间：
2015-06-01
影响因子：
5.8
通讯作者：
Slafer, Gustavo A.
中科院分区：
文献类型：
--
作者：
Ferrante, Ariel;Savin, Roxana;Slafer, Gustavo A.
未来增加籽粒数可以通过提高结实效率（FE;开花期每单位穗干重的结实粒数）来实现。在最近的实验中，发现谷物的平均重量与FE之间存在负相关关系。本文的目的是确定这种负相关性是否是本构的（即FE增加导致所有晶粒变小）或由较小潜在尺寸的晶粒比例增加引起的。在2008-2009年和2009-2010年连续两个生长季（2008-2009年和2009-2010年）进行了4个试验，涉及8种不同的环境条件，比较了2个硬粒小麦品种在FE和平均粒重方面的差异。在这些条件下，我们确定了FE，并进行了全面的研究，详细分析了沿着每个小穗的每个单独的谷粒的重量。平均所有试验条件，有平均粒重（GW）和出菇效率（FE）之间的负相关关系。Donduro与低FE生产的平均较重的谷物比Vitron。然而，当考虑单个谷物时，一般来说，GW没有差异。因此，平均粒重与FE之间的负相关关系不是组成性的，并且主要代表由于FE增加而导致小穗内远端籽粒或顶端小穗籽粒比例的增加，从而降低了平均粒重。颗粒的大小，但大多数情况下不影响特定颗粒的大小。这为在小麦育种计划中使用FE作为进一步提高产量潜力的标准的想法提供了进一步和更有力的支持。(C)2015 Elsevier B. V.版权所有。
Future increases in grain number may be achieved through improving fruiting efficiency (FE; grains set per unit spike dry weight at anthesis). In recent experiments it was found a negative relationship between the average weight of the grains and FE. The objective of this paper was to determine whether this negative relationship was constitutive (i.e. the increased FE caused all grains to be smaller) or resulted from the increased proportion of grains of smaller potential size. Four experiments, involving 8 different environmental conditions, were carried out during two consecutive growing seasons (2008-2009 and 2009-2010) in which two durum wheat cultivars contrasting in FE and average grain weight were compared. In these conditions we determined FE and carried out a comprehensive study analysing in detail the weights of each individual grain along each of the spikelets. Averaging all experimental conditions, there was a negative relationship between average grain weight (GW) and fruiting efficiency (FE). Donduro with low FE produced in average heavier grains than Vitron. However, when considering individual grains there were, in general, no differences in GW. Therefore, the negative relationship between average grain weight and FE would not be constitutive, and would mostly represent the increase in the proportion of distal grains within the spikelets or of grains from apical spikelets as a consequence of an increased FE, reducing the average size of the grain but mostly unaffecting the size of particular grains. This provides further and stronger support to the idea of using FE as a criterion to further raise yield potential in wheat breeding programmes. (C) 2015 Elsevier B.V. All rights reserved.