The value of different dwarfing genes in winter wheat breeding was studied using 6 near-isogenic lines carrying different Rht dwarfing genes over three years experiment.Results showed that both the Rht1 and Rht2 semi-...The value of different dwarfing genes in winter wheat breeding was studied using 6 near-isogenic lines carrying different Rht dwarfing genes over three years experiment.Results showed that both the Rht1 and Rht2 semi-dwarfing genes had significantlypositive effects on kernel number and grain weight per spike, and had significantlynegative effects on 1000-grain weight comparing to the tall line(rht) and the Rht3 line.The Rht3 dwarfing gene had a significantly negative effect on kernel number per spike,and had positive effect on 1000-grain weight. The combination of the Rht2 and Rht3 geneshowed significantly negative effect on yield components. All of these 5 dwarfing orsemidwarfing genotypes mentioned above had a significantly negative effect on plantheight and no significant effect on the area of flag leaf, spikelets per spike and spikelength.展开更多
The high molecular weight glutenin subunits (HMW-GS) 7+8 were introduced into the Long 97–586 (1,7,2+12) wheat variety (Triticum aestivum) by 5 consecutive backcrosses with biochemical marker–assisted selection.Near...The high molecular weight glutenin subunits (HMW-GS) 7+8 were introduced into the Long 97–586 (1,7,2+12) wheat variety (Triticum aestivum) by 5 consecutive backcrosses with biochemical marker–assisted selection.Nearly isogenic lines (NILs) of HMW-GS 7 and 7+8 were obtained,and the NILs were planted in the experimental field at the Crop Breeding Institute of Heilongjiang Academy of Agricultural Science in 2004–2006.The field experiments were designed using the two-column contrast arrangement method with six replicates in 2004–2005 and four replicates in 2006.The result of three years experiments showed that the differences between NILs of Long 97–586 with subunit 7 and those with subunits 7+8 in the quality parameters of flour protein content and dry gluten content were negligible (P】0.1).However,the differences in some of the quality parameters were remarkably significant (P【0.01),including wet gluten content,ratio of wet gluten/dry gluten,gluten index,Zeleny sedimentation,ratio of sedimentation/dry gluten,and the farinogram parameters of water absorption,development time,stability,breakdown time and degree of softening.The difference between NILs with subunits 7+8 and subunit 7 was significant (P【0.05) on the alveogram W value and had a critical value (P=0.05) on the alveogram P value in 2006.The results show that HMW-GS 7+8 is far superior to HMW-GS 7 in terms of baking quality.The possibilities of using subunits 7+8 and subunit 7 in breeding strong and weak gluten wheat varieties are discussed in this paper.展开更多
基金supported by the Provincial Natural Science Foundation of Hebei,China(396313).
文摘The value of different dwarfing genes in winter wheat breeding was studied using 6 near-isogenic lines carrying different Rht dwarfing genes over three years experiment.Results showed that both the Rht1 and Rht2 semi-dwarfing genes had significantlypositive effects on kernel number and grain weight per spike, and had significantlynegative effects on 1000-grain weight comparing to the tall line(rht) and the Rht3 line.The Rht3 dwarfing gene had a significantly negative effect on kernel number per spike,and had positive effect on 1000-grain weight. The combination of the Rht2 and Rht3 geneshowed significantly negative effect on yield components. All of these 5 dwarfing orsemidwarfing genotypes mentioned above had a significantly negative effect on plantheight and no significant effect on the area of flag leaf, spikelets per spike and spikelength.
基金supported by the National Natural Science Foundation of China (Grant No. 30170577)Science and Technology Department of Heilongjiang Province (Grant No. GC04B111)
文摘The high molecular weight glutenin subunits (HMW-GS) 7+8 were introduced into the Long 97–586 (1,7,2+12) wheat variety (Triticum aestivum) by 5 consecutive backcrosses with biochemical marker–assisted selection.Nearly isogenic lines (NILs) of HMW-GS 7 and 7+8 were obtained,and the NILs were planted in the experimental field at the Crop Breeding Institute of Heilongjiang Academy of Agricultural Science in 2004–2006.The field experiments were designed using the two-column contrast arrangement method with six replicates in 2004–2005 and four replicates in 2006.The result of three years experiments showed that the differences between NILs of Long 97–586 with subunit 7 and those with subunits 7+8 in the quality parameters of flour protein content and dry gluten content were negligible (P】0.1).However,the differences in some of the quality parameters were remarkably significant (P【0.01),including wet gluten content,ratio of wet gluten/dry gluten,gluten index,Zeleny sedimentation,ratio of sedimentation/dry gluten,and the farinogram parameters of water absorption,development time,stability,breakdown time and degree of softening.The difference between NILs with subunits 7+8 and subunit 7 was significant (P【0.05) on the alveogram W value and had a critical value (P=0.05) on the alveogram P value in 2006.The results show that HMW-GS 7+8 is far superior to HMW-GS 7 in terms of baking quality.The possibilities of using subunits 7+8 and subunit 7 in breeding strong and weak gluten wheat varieties are discussed in this paper.
