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外文期刊>fresenius environmental bulletin
>DIALLEL ANALYSIS OF SPAD, YIELD COMPONENT AND NITROGEN USE EFFICIENCY OF SOME BREAD WHEAT GENOTYPES UNDER LOW AND HIGH NITROGEN LEVELS
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DIALLEL ANALYSIS OF SPAD, YIELD COMPONENT AND NITROGEN USE EFFICIENCY OF SOME BREAD WHEAT GENOTYPES UNDER LOW AND HIGH NITROGEN LEVELS
Wheat is an extremely essential food crop. It offers a huge wealth of material for genetic analyses due to its broad ecological distribution. Due to extraordinary production cost and restrain the pollution to the environment, it is imperative to decrease the amount of nitrogen (N) fertilizer used on wheat crops. Therefore, a full diallel cross mating design among 4 bread wheat was determined under low (NtO, no N fertilizer) and high (Ntl5, 150 kg N ha_1) N levels for SPAD, some quality and nitrogen use efficiency characters to assess general combining ability (GCA) and specific combining ability (SCA) effects and their interactions with nitrogen levels. The analysis of variance was significant for all the characters which showed a significant variability between the two nitrogen levels, except for the starch content. GCA was highly significant effects for SPAD at heading growth stage, SPAD at the anthesis growth stage, thousand kernel weight (TWK) and starch content. While SCA effects were highly significant for grain yield, grain nitrogen yield (GNY), grain nitrogen yield nitrogen use efficiency (gnyNUE) and grain yield nitrogen use efficiency (gyNUE). The GCA / SCA ratio was less than one for grain yield, GNY, gnyNUE and gyNUE. These findings indicate that the non-additive genetic effects were more significant than additive gene action and played a key role in these traits. Cultivar 84CZT04 had the best GCA effects for TWK, protein content, grain yield, GNY, gnyNUE and gyNUE at low and high N levels.
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机译:小麦是一种极其重要的粮食作物。由于其广泛的生态分布,它为遗传分析提供了丰富的材料。由于特殊的生产成本和对环境污染的限制,必须减少小麦作物的氮肥使用量。因此,在低氮(NtO,无氮肥)和高(Ntl5,150 kg N ha_1)氮水平下,确定了4种面包小麦的全二等位杂交配设计,以评价一般结合能力(GCA)和比结合能力(SCA)效应及其与氮水平的交互作用。方差分析对所有性状均具有显著性,除淀粉含量外,两种氮水平之间存在显著差异。GCA对抽穗生育期SPAD、花生长期SPAD、千粒重(TWK)和淀粉含量均有极显著影响。SCA效应对籽粒产量、籽粒氮素产量(GNY)、籽粒氮素产量氮素利用效率(gnyNUE)和籽粒产量氮素利用效率(gyNUE)均具有显著性。籽粒产量、GNY、gnyNUE和gyNUE的GCA/SCA比值均小于1。这些结果表明,非加性遗传效应比加性基因作用更显著,并在这些性状中起关键作用。品种84CZT04在低氮和高氮水平下对TWK、蛋白质含量、籽粒产量、GNY、gnyNUE和gyNUE的GCA效果最好。
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