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Salinity is globally a major constraint for crop production. Breeding for salinity tolerance is an effective approach to improve crop production and productivity under saline conditions provided it is based on a good understanding of the genetic control of salinity tolerance. This study deals with mapping QTLs for salinity tolerance in durum wheat (Triticum durum) by association analysis using SSR...
Cooler canopy temperatures and glaucousness have both been identified as adaptive traits for improving abiotic stress tolerance in wheat. The objective of this study was to determine if glaucousness resulting from the constitutive production of leaf cuticular waxes was associated with cooler leaf and spike temperatures under heat stress and to identify associated quantitative trait loci (QTL). A set...
The total growth duration (TGD), the days from emergence to maturation of the soybean, can be divided into vegetative period (VP) and reproductive period (RP). The ratio of RP to VP (R/V) is an index to investigate evolutionary trends and understand the relationships between different growth periods. To increase our understanding of growth period traits with emphasis on R/V, four generation segregated...
To identify quantitative trait loci (QTLs) for flower-related characters in Luffa , a genetic map was constructed by using 110 F 2 individuals derived from interspecific hybrids between Luffa acutangula Roxb. (inbred line ‘28-0-0’) and L. cylindrica Roem. (inbred line ‘37-0-1-1’). A total of 258 sequence-related amplified polymorphism markers...
Branching is an important horticultural trait that influences plant architecture and production of cut chrysanthemum; however, its genetic determinism is poorly understood. In this study, an F 1 mapping population derived from a cross between two spray cut chrysanthemum cultivars was used to determine QTL underlying branching. The branching traits in the F 1 mapping...
In recent years, sorghum ( Sorghum bicolor (L.) Moench) has gained attention as a food, feed, and biofuel crop, but yield improvements have lagged behind those in other crops. Here, we investigated quantitative trait loci (QTLs) associated with yield and yield-related traits in sorghum. We measured eight morphological traits related to yield potential in an F 2 and F...
Blast (caused by Magnaporthe oryzae B. Couch) is an economically important and mutable disease of rice (Oryza sativa L.). To analyze the genetic mechanism of blast resistance in rice cultivar CR185; we used CR185 as a donor parent to establish a BC3F1 and derived BC3F2 backcross population in the Zhenshan 97B (ZS97B) background. By challenging the population with natural infection in 2008 and 2009,...
Peanut, an important oil producing crop contains bioactive compounds like phenolics and flavonoids which determine its antioxidative activity. We report here the genetic variability for total phenolics, flavonoids and DPPH radical scavenging activity of testaless seeds of a peanut recombinant inbred line population. On an average, the population contained 1.65 mg GAE/g and 240 µg CE/g of phenolics...
The yield of maize (Zea mays L.) is affected by the plant architecture which is associated with the distribution of light within canopy and utilization of solar energy within population. Plant architecture of maize is mainly characterized by leaf angle (LA) and leaf space (LS). To analyze the genetic mechanism of LA and LS above ear position in maize, a genetic linkage map composed of 212 simple sequence...
Leaves are vital plant organs, and a high level of variation in leaf shape, including the leaf lobes, is present in Brassica rapa. Based on a previously-constructed linkage map, QTL analysis of the leaf lobes was performed using the scores from an F2 population during the spring of 2010, and scores from an F2:3 family in the autumn of 2010, respectively. A total of nine QTLs were found to affect leaf...
Nitrogen (N) is the most important macronutrient for plant growth and development. Hence, understanding genetic architectures and functional genes involved in the response to N deficiency can greatly facilitate the development of low-N-tolerant cultivars. In this study, we collected 212 quantitative trait loci (QTL) of agronomically important traits under low-N stress conditions in maize. We then...
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