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The spider-type azalea cultivars, Rhododendron kaempferi ‘Kin-kujyaku’ and Rhododendron macrosepalum ‘Seigaiha’, are characterized by extremely narrow leaves and choripetalous flowers with narrow petals. Previous morphological analysis of these cultivars revealed that narrowed organs would be a common mutation in the growth of lateral organs in the transverse plane. In the present study, we focused...
The Gossypium barbadense L. cotton is known for its superior quality fibre. A study on the identification of quantitative trait loci (QTL) responsible for fibre quality and other economic traits in this species will ultimately hasten the process of cotton improvement. In the present study, using 63K Illumina Infinium SNP bead chip, 525 homozygous polymorphic markers were detected between the parents,...
Fusarium head blight (FHB) is one of the most serious diseases in small-grain cereals including triticale (× Triticosecale Wittmack). The disease reduces yield and accumulates mycotoxins which are harmful to human and animal health. Triticale grain is almost exclusively used on-farm in feed formulations for swine and other animals, and swine is the most susceptible farm animal to Fusarium mycotoxins...
Halosulfuron (Sandea) herbicide is recommended to control problem weeds with the use of hood for cotton protection. However, no information is available on genotypic variation in cotton response to Sandea. In this study, 104 entries representing 81 cotton genotypes including 8 Pima (Gossypium barbadense L.) and 73 Upland (G. hirsutum L.) genotypes were divided into four replicated tests for evaluation...
Wheat grain protein concentration (GPC) is negatively associated with economic grain yield (GY) hindering attempts to improve these traits simultaneously. Studies indicate the incorporation of the Gpc-B1 high grain protein gene from emmer wheat into commercial wheat cultivars improves grain quality and nitrogen use efficiency with little effect on GY. Molecular markers are helpful in tracking such...
The Vietnamese rice landrace Tetep is known world-wide for its exceptional broad-spectrum and durable resistance to blast disease caused by Pyricularia oryzae. In present study, we report on identification and mapping of a new blast resistance gene Pi-67 from a doubled haploid line TDH251 that derives its resistance from Tetep. Using a multipronged mapping strategy combining bulked segregant analysis,...
Population improvement in maize (Zea mays L.) aims to increase favorable allele frequencies yet maintain genetic variability. The direction of future population improvement has usually been determined by evaluating the performance of maize populations after several cycles of selection. However, relatively few studies have been conducted to understand in advance the breeding potential of inbred lines...
Leaf scald caused by Rhynchosporium commune (formerly R. secalis) is an important fungal disease in barley (Hordeum vulgare) in western Canada. Pyramiding multiple scald resistance qualitative trait loci (QTL) is considered an effective strategy for breeding durable scald resistance into barley. The objective of this study was to map QTLs with restriction site-associated (RAD) markers and identify...
Triploid breeding in Populus enhances the commercial properties of cultivated trees. Sexual polyploidization through the production of diploid gametes produces elite triploids with heterosis and ploidy vigour. Populus pseudo-simonii is a species indigenous to China. It is highly adaptable and resistant drought, cold, and saline–alkaline stresses. To improve the properties in growth and pulpwood traits...
The aim of this study was to assess genotype by environment interaction for seed quality traits in interspecific cross-derived Brassica lines by the additive main effects and multiplicative interaction (AMMI) model. The study comprised of 25 winter rapeseed genotypes i.e.: B. napus cultivar Californium, twenty three cross-derived Brassica lines and male sterile line of an F8 generation of B. napus...
Assessment of quantitative traits in bi-parental progenies provides a strategy to identify drought tolerant genotypes and stress-adaptive traits in wheat. A recombinant inbred line (RIL) population with 167 lines produced from the SeriM82/Babax cross was subjected to normal irrigation and drought stress (at the heading stage) under field conditions. The study was done in Bajgah, Shiraz, Fars province,...
Improving early maturity in upland cotton (Gossypium hirsutum L.) is an important target in breeding. The node of the first fruiting branch (NFFB) and its height (HNFFB) are two important indexes to measure early maturity in cotton. To facilitate breeding for early maturity traits in upland cotton and reveal the genetic control underlying the two traits, a genome-wide association study was performed...
Carrots are typically classified as annual or biennial, depending on their vernalization requirement for flowering, a trait that is genetically-conditioned. Wild carrots are predominantly annual, requiring less hours of cold temperatures for flower induction, whereas most cultivated carrots are biennial (i.e., they have higher cold temperature requirements). After vernalization, if followed by long...
Winged bean (P. tetragonolobus (L.) DC.) is a leguminous crop that could contribute towards food security in tropical areas, but whose growth and development is still poorly understood. In order to develop improved individuals for increased green pod and seed productivity, we investigated the factors involved in winged bean plant architecture, development, and their link to a number of yield-related...
Genotyping costs can be reduced without decreasing the genomic selection accuracy through methodologies of markers subsets assortment. Thus, we compared two strategies to obtain markers subsets. The former uses the primary and the latter the re-estimated markers effects. Moreover, we analyzed each subset via prediction accuracy, bias, and relative efficiency by main genotypic effect model (MGE) fitted,...
Protein content is a key quality trait for the potato starch industry. The objective of this study was to identify allele-specific quantitative trait loci (QTLs) for tuber protein content in cultivated potato (Solanum tuberosum L.) at the tetraploid level. We analysed 496 full-sib F1 clones in a 3-year field trial to dissect the complex genetic architecture of soluble tuber protein content. Genotypic...
Early blight, caused by different species of Alternaria, is a major and destructive disease of potato worldwide. In recent years, Alternaria tenuissima is recognized as the most prevalent species of this phytopathogenic fungus in potato fields of Asian countries, which causes high yield losses every year. Any potato cultivar with complete resistance to early blight is not recognized, so far. Therefore,...
Consumers prefer watermelon with sweet, red flesh, and the presence of lycopene, citrulline and arginine phytochemicals helpful for human health is an additional bonus. Breeders often select fruit with desirable flesh characteristics based on soluble solids content (Brix) and visual flesh color. Although marker assisted selection (MAS) of flesh traits would advance germplasm selection efficiency,...
Two line hybrid rice (Oryza sativa L.) breeding uses environment-sensitive genic male sterile (EGMS) lines to produce sterile or fertile pollen depending on daylength and/or temperature. There is limited information on the performance and genetic control of EGMS lines under U.S. environments. Therefore, genetic characterization of two F2 and four BC1F2 populations derived from EGMS line 2009S was...
Developing host resistance is an effective measure to minimize the yield losses caused by biotic stresses in crop plants. Generation of genomic resources greatly facilitates the development of resistant plants. Microsatellite markers speed up the selection procedure and introgression of resistant alleles in rice breeding programme. Candidate gene based SSR (cgSSR) markers are preferred over genomic...
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