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Phosphorus (P) deficiency is one of the major constraints to wheat production worldwide. In this study, conditional and unconditional quantitative trait locus (QTL) analyses for 12 traits of wheat seedlings under P-normal and P-deficient conditions were conducted using three F9 recombinant inbred line (RIL) populations with a common female parent in wheat. Of the total 110 QTLs identified by unconditional...
Grain protein content (GPC) and gluten quality are the most important factors determining the end-use quality of wheat for pasta-making. Both GPC and gluten quality are considered to be polygenic traits influenced by environmental factors and other agricultural practices. Two related F8:9 recombinant inbred line (RIL) populations were generated to localise genetic factors controlling seven quality...
Soybean mosaic virus (SMV) disease is one of the most destructive soybean (Glycine max (L.) Merr.) diseases worldwide, causing yield losses and significant deterioration in seed quality. ‘Qihuang No.1’ has a wide resistance spectrum and is extensively used in breeding programs in China. The dominant SMV resistance gene RSC14Q from the cultivar Qihuang No.1 was previously mapped to a 4.2 cM region...
Plant height (PHT), stem and leaf fresh weight (SLFW), juice weight (JW) and sugar content of stem (Brix) are important traits for biofuel production in sweet Sorghum. QTL analysis of PHT, SLFW, JW and Brix was conducted with composite interval mapping using F2 and F2:3 populations derived from the cross between grain Sorghum (Shihong137) × sweet Sorghum (L-Tian). Three QTLs controlling PHT were mapped...
Quantitative trait locus (QTL) analysis of kernel shape and weight in common wheat was conducted using a set of 131 recombinant inbred lines (RIL) derived from ‘Chuan 35050’ × ‘Shannong 483’. The RIL and their two parental genotypes were evaluated for kernel length (KL), kernel width (KW), thousand-kernel weight (TKW), and test weight (TW) in four different environments. Twenty QTL were located on...
Summary In this study a new trigeneric hybrid involving species from the Triticum, Secale and Leymus was produced by crossing octoploid triticale (Jinsong49) with octoploid tritileymus (950059). The chromosome constitution of the parental amphiploid, trigeneric hybrid and its progenies were studied. Genomic in situ hybridization (GISH) analysis showed that Jinsong49 and 950059 had 44 wheat chromosomes,...
The cowpea trypsin inhibitor gene (CpTI) and neomycin phosphotransferase gene (nptII) were introduced into the embryonic callus cells of immature embryos of wheat elite line Shannong 995604 using Agrobacterium-mediated gene transfer. Independent plantlets were regenerated from kanamycin-resistant calli. PCR and real time PCR analysis, PCR-Southern and Southern blot hybridization indicated that there...
Summary Octoploid Tritileymus was the partial amphiploid obtained from Triticum aestivum × Leymus mollis, its chromosome constitution was 14 Leymus chromosomes and 42 wheat chromosomes. In the pollen development of Tritileymus, some abnormalities were observed, such as the absence of tetrad formation, cytomixis of microspores, irregular shape of some microspores and multi-germination pores, symmetrical...
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