RELATIONSHIPS AMONG DURATIONS OF VEGETATIVE AND GRAIN FILLING PHASES, YIELD COMPONENTS, AND GRAIN-YIELD IN DURUM-WHEAT CULTIVARS
RELATIONSHIPS AMONG DURATIONS OF VEGETATIVE AND GRAIN FILLING PHASES, YIELD COMPONENTS, AND GRAIN-YIELD IN DURUM-WHEAT CULTIVARS
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DOI：
10.2135/cropsci1982.0011183x002200020021x
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发表时间：
1982-01-01
期刊：
影响因子：
2.3
通讯作者：
BAKER, RJ
中科院分区：
文献类型：
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作者：
GEBEYEHOU, G;KNOTT, DR;BAKER, RJ
为了研究硬粒小麦营养(开花前)和灌浆(花后)的产量、产量构成因素和持续期之间的关系，分别于1978年和1979年在加拿大萨斯卡通进行了旱作和灌溉条件下的田间试验。综合相关系数的通径系数分析揭示了所测量的6个特征之间复杂的关系模式。这种模式部分隐藏在对相关系数的肤浅研究中。生育期长短对穗粒数(r=0.29)和粒重(r=0.42)有正向影响，对产量有正向影响。每平方米穗数的增加似乎与较短的灌浆期(通径系数，P=-0.31)、较少的每穗粒数(P=-0.34)和较轻的籽粒(P=-0.50)有关。每平方米穗数与营养期长度之间的负相关(r=-0.51)增加了这些关系的复杂性。
In order to study the relationships among grain yield, yield components and duration of the vegetative (pre-anthesis) and grain filling (post-anthesis) periods in durum wheat (Triticum turgidum L.), field experiments were conducted in 1978 and 1979 under rainfed and in 1979 under irrigated conditions at Saskatoon [Canada]. Path coefficient analysis of pooled correlation coefficients revealed a complex pattern of relationships among the 6 characteristics measured. This pattern was partly hidden in the superficial study of correlation coefficients. Duration of the vegetation period had a positive influence on kernels per spike (r = 0.29) and on kernel weight (r = 0.42) which in turn had postive effects on yield. An increase in number of spikes per m2 appears to be associated with shorter grain filling periods (path coefficient, P = -0.31), fewer kernels per spike (P = -0.34), and lighter kernels (P = -0.50). The negative correlation (r = -0.51) between spikes per m2 and length of the vegetative period imparted an additional complexity to these relationships.