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Inheritance and Availability of high grain number per spike in Two Wheat Germplasm Lines

Journal of Integrative Agriculture 2012年第9期11卷 1409-1416页

作者： CHEN Dan ZHANG Jin-peng WANG Jian-sheng YANG Xin-ming LIU Wei-hua GAQ Ai-nong LI Xiu-quan LI Li-hui National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Hybrid Rapeseed Research Center of Shaanxi Province/Shaanxi Rapeseed Branch of National Oil Crops Genetic Improvement Center Dali 715105 P.R.China

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 F1 hybrids in 2007-2008 and F2 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 F2 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 F2 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.

关键词： wheat high grain number per spike inheritance yield breeding

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Gene and protein expression profiling analysis of young spike development in large spike wheat germplasms

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Journal of Integrative Agriculture 2016年第4期15卷 744-754页

作者： CHEN Dan ZHANG Jin-peng LIU Wei-hua WU Xiao-yang YANG Xin-ming LI Xiu-quan LU Yu-qing LI Li-hui National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China Biotechnology and Germplasm Resources Institute Yunnan Academy of Agricultural SciencesKey Laboratory of Southwestern Crop Gene Resources and Germplasm InnovationMinistry of Agriculture/Scientific Observation for Rice Germplasm Resources of YunnanMinistry of Agriculture/Yunnan Provincial Key Laboratory of Agricultural BiotechnologyKunming 650223P.R.China

The wheat grain number per spike （GNPS） is a major yield-limiting factor in wheat-breeding programs. Germplasms with a high GNPS are therefore valuable for increasing wheat yield potential. To investigate the molecular characteristics of young spike development in large-spike wheat germplasms with high GNPS, we performed gene and protein expression profiling analysis with three high-GNPS wheat lines （Pubing 3228, Pubing 3504 and 4844-12） and one Iow-GNPS control variety （Fukuho）. The phenotypic data for the spikes in two growth seasons showed that the GNPS of the three large-spike wheat lines were significantly higher than that of the Fukuho control line. The Affymetrix wheat chip and isobaric tags for relative and absolute quantitation-tandam mass spectrometry （iTRAQ-MS/MS） technology were employed for gene and protein expression profiling analyses of young spike development, respectively, at the floret primordia differentiation stage. A total of 598 differentially expressed transcripts （270 up-regulated and 328 down-regulated） and 280 proteins （122 up- regulated and 158 down-regulated） were identified in the three high-GNPS lines compared with the control line. We found that the expression of some floral development-related genes, including Wknoxlb, the AP2 domain protein kinase and the transcription factor HUA2, were up-regulated in the high-GNPS lines. The expression of the SHEPHERD （SHD） gene was up-regulated at both the transcript and protein levels. Overall, these results suggest that multiple regulatory pathways, including the CLAVATA pathway and the meristem-maintaining KNOX protein pathway, take part in the development of the high-GNPS phenotype in our wheat germplasms.

关键词： wheat high grain number per spike spike development expression profiling

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