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In maize, the fungi that cause Fusarium ear rot result not only in decreased grain yield and quality, but also grain contamination by fumonisin. This study investigated the inheritance of fumonisin contamination resistance (FCR) in tropical maize, based on a multi-environment trials diallel analysis via mixed models. For this purpose, based on 13 inbred lines, single-cross hybrids were created and...
To elucidate the mechanism of plant growth we investigated chromosome region affecting traits (CRATs) using the chromosome segment substitution lines derived from a cross between japonica ‘Koshihikari’ and indica ‘Kasalath’ using rice (Oryza sativa L.). Four CRATs associated with increased plant growth rate were identified which were derived from ‘Kasalath’ alleles on chromosomes 1, 6, 8 and 12. This...
Traits such as berry weight, firmness, and sweetness are important determinants of consumer choice and marketability of table grapes. Quantitative trait locus (QTL) analyses of berry traits have been conducted and markers have been developed mainly in Vitis vinifera. Interspecific hybrid grape (Vitislabruscana × V. vinifera) is particularly valuable in wet climates, but no QTL analyses...
We analyzed the heredity of anther morphology in rice (Oryza sativa L.) using incomplete diallel crosses of six japonica restorer lines and eight cytoplasmic male-sterile (CMS) lines, and 48 F1 combinations resulting from these crosses. We analyzed four traits: the length of dehiscence formed in the apical (ADL) and basal (BDL) parts of the anther and the respective widths, ADW and BDW. The ratios...
Fusarium verticillioides and F. graminearum cause ear rots in maize (Zea mays L.) that reduce yield and contaminate the grain with mycotoxins produced by the fungi. To map QTLs for resistance to these ear rots, a F5 mapping population, consisting of 298 recombinant inbreds obtained by randomly selfing of the cross between LP4637 (moderately resistant) and L4674 (susceptible), was genotyped...
To improve soybean broad-spectrum disease resistance, a bivalent plant expression vector carrying the GbNPR1 and HrpZpsg12 genes with the Bar gene as a selectable marker was constructed and transformed into soybean cultivar ‘Jinong 28’ using an Agrobacterium-mediated method. The results of PCR, Southern blot and SDS-PAGE analyses indicated that the two disease resistance genes, GbNPR1 and HrpZpsg12...
Plant architecture is an important determinant of tomato yield because it affects light distribution within a crop canopy. One hundred and eleven lines of a BC1F8 population developed from Solanum lycopersicum ‘M570018’ and its wild relative Solanum pimpinellifolium (PI124039) were grown in a glasshouse in spring and autumn, and plant architecture traits evaluated at two leaf positions: the last leaf...
Studies on genetic gains in grain yield and other traits may be very useful in providing necessary information to plant breeders about the effectiveness of their breeding programs. The objective of this research was to analyze changes in grain yield, yield stability and morphological characteristics of maize hybrids released in Serbia between 1978 and 2011. Five hybrids, representatives of different...
Mildew resistance locus o (Mlo) is a specific seven-transmembrane gene family that confers resistance against several abiotic and biotic stresses in plants. In this study, we identified nine Mlo-like loci,VfMlo-like3243 (Vitis flexuosa powdery-mildew resistance locus o-like3243), VfMlo-like4098, VfMlo-like5057, VfMlo-like6833, VfMlo-like7881, VfMlo-like8120, VfMlo-like14439, VfMlo-like14557, and VfMlo...
In our previous study, we identified a QTL for cold tolerance at the booting stage of ‘Ukei840’, the cold tolerance of which is derived from one of the most tolerant cultivars, ‘Lijiangxintuanheigu’, in Yunnan province of China, in a 1.2-Mb region between RM7000 and RM3719 markers on chromosome 3. In the present study, we delimited the previously identified QTL to a region of about 35 kb by SSR and...
Maize production constraints in sub-Saharan Africa (SSA) are being addressed by CIMMYT and partners through an array of projects, focusing on developing and evaluating parental inbred lines and single-crosses as well as formulating, evaluating and releasing high-yielding and stress resilient hybrids adapted to different agro-ecologies. The objectives of the present study were to (1) evaluate the grain...
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