Inheritance and Availability of High Grain Number Per Spike in Two Wheat Germplasm Lines
Inheritance and Availability of High Grain Number Per Spike in Two Wheat Germplasm Lines
复制标题
两个小麦种质系高穗粒数的遗传与利用
DOI：
10.1016/s2095-3119(12)60140-3
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发表时间：
2012-01-01
影响因子：
4.8
通讯作者：
Li Li-hui
中科院分区：
文献类型：
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作者：
Chen Dan;Zhang Jin-peng;Li Li-hui
穗粒数是小麦产量育种中的一个重要因素。小麦高产育种广泛重视GNPS种质的开发。本文报道了两个在不同生态区具有稳定、广泛适应性的高粒重小麦种质系：普冰3228和普冰3504。以普冰3228和普冰3504为共同亲本，采用互反套杂交设计，对不同组合2007-2008年F1代和2008-2009年F2代群体GNPS表型进行了研究，GNPS狭义遗传力分别达到49.58%和52.23%。遗传模型分析表明，普冰3228和普冰3504的GNPS主要受加性遗传效应控制。穗粒重与F-2群体千粒重的相关分析表明，穗粒重不受穗粒重的影响。F-2分离群体中单株穗数（SNPP）、GNPS和TKW三个产量构成因素之间的良好协调性意味着在育种计划中选择好的候选个体将是相对简单的。研究结果表明，普冰3228和普冰3504是两个在小麦系谱选择中具有潜力的GNPS产量改良种质系。
Grain number per spike (GNPS) is a major factor in wheat yield breeding. The development of high GNPS germplasm is widely emphasized in wheat-yield breeding. This paper reported two high GNPS wheat germplasm lines, Pubing 3228 and Pubing 3504, which had a stable and wide adaptability to different ecological regions. By exploring a nested cross design with reciprocals using Pubing 3228 or Pubing 3504 as a common parent and investigating the GNPS phenotypes of F-1 hybrids in 2007-2008 and F-2 populations in 2008-2009 of different cross combinations, the narrow-sense GNPS heritability was up to 49.58 and 52.23%, respectively. Genetic model analysis predictions suggested that GNPS in Pubing 3228 and Pubing 3504 was mainly controlled by additive genetic effects. Correlation analysis results between GNPS and 1 000-kernel weight (TKW) of F-2 populations showed that TKW was not influenced with the increase of GNPS. The good coordination among three yield components of spike number per plant (SNPP), GNPS, and TKW in the F-2 segregating population implied that selection of good candidate individuals in breeding programs would be relatively straightforward. Overall, our results indicated that Pubing 3228 and Pubing 3504 are two potential germplasm lines for yield improvement of GNPS in pedigree selection of wheat breeding.