Chickpea (Cicer arietinum) is among the founder crops domesticated in the Fertile Crescent. One of two major forms of chickpea, the so-called kabuli type, has white flowers and light-colored seed ...coats, properties not known to exist in the wild progenitor. The origin of the kabuli form has been enigmatic.
We genotyped a collection of wild and cultivated chickpea genotypes with 538 single nucleotide polymorphisms (SNPs) and examined patterns of molecular diversity relative to geographical sources and market types. In addition, we examined sequence and expression variation in candidate anthocyanin biosynthetic pathway genes.
A reduction in genetic diversity and extensive genetic admixture distinguish cultivated chickpea from its wild progenitor species. Among germplasm, the kabuli form is polyphyletic. We identified a basic helix–loop–helix (bHLH) transcription factor at chickpea’s B locus that conditions flower and seed colors, orthologous to Mendel’s A gene of garden pea, whose loss of function is associated invariantly with the kabuli type of chickpea.
From the polyphyletic distribution of the kabuli form in germplasm, an absence of nested variation within the bHLH gene and invariant association of loss of function of bHLH among the kabuli type, we conclude that the kabuli form arose multiple times during the phase of phenotypic diversification after initial domestication of cultivated chickpea.
For children with moderate or severe cerebral palsy (CP), a foundational early goal is independent sitting. Sitting offers additional opportunities for object exploration, play and social engagement. ...The achievement of sitting coincides with important milestones in other developmental areas, such as social engagement with others, understanding of spatial relationships, and the use of both hands to explore objects. These milestones are essential skills necessary for play behavior. However, little is known about how sitting and play behavior might be affected by a physical therapy intervention in children with moderate or severe CP. Therefore, our overall purpose in this study was to determine if sitting skill could be advanced in children with moderate to severe CP using a perceptual motor intervention, and if play skills would change significantly as sitting advanced. Thirty children between the ages of 18 months and 6 years who were able to hold prop sitting for at least 10 s were recruited for this study. Outcome measures were the sitting subsection of the Gross Motor Function Measure (GMFM), and the Play Assessment of Children with Motor Impairment play assessment scale, which is a modified version of the Play in Early Childhood Evaluation System. Significant improvements in GMFM sitting scores (p < 0.001) and marginally significant improvement in play assessment scores (p = 0.067) were found from pre- to post-intervention. Sitting change explained a significant portion of the variance in play change for children over the age of 3 years, who were more severely affected by CP. The results of this study indicate that advances in sitting skill may be a factor in supporting improvements in functional play, along with age and severity of physical impairment.
Many different studies have been conducted to determine the prevalence rates of Autism Spectrum Disorder (ASD) in the United States. The methodologies of these studies have varied, resulting in a ...multitude of publications with differing prevalence rates. Because there is such a wide range in the results of prevalence studies, it may be difficult for individual states to determine their rates. Accurate prevalence rates are important to obtain for many different reasons including increasing advocacy and awareness, increasing funding, and proper allocation of services for individuals with ASD and their families. Additionally, prevalence studies can be used to assess which groups are more at risk for ASD based off location and environmental factors. This paper describes different methodologies that can be utilized to determine ASD prevalence rates, the strengths and weaknesses of each method, and the challenges to determining accurate rates. This paper also includes the results from a study conducted in Nebraska to determine prevalence rates of ASD in the state. Implications for future prevalence studies are addressed and recommendations are provided.
Domesticated species are impacted in unintended ways during domestication and breeding. Changes in the nature and intensity of selection impart genetic drift, reduce diversity, and increase the ...frequency of deleterious alleles. Such outcomes constrain our ability to expand the cultivation of crops into environments that differ from those under which domestication occurred. We address this need in chickpea, an important pulse legume, by harnessing the diversity of wild crop relatives. We document an extreme domestication-related genetic bottleneck and decipher the genetic history of wild populations. We provide evidence of ancestral adaptations for seed coat color crypsis, estimate the impact of environment on genetic structure and trait values, and demonstrate variation between wild and cultivated accessions for agronomic properties. A resource of genotyped, association mapping progeny functionally links the wild and cultivated gene pools and is an essential resource chickpea for improvement, while our methods inform collection of other wild crop progenitor species.
Crop wild relatives are a reservoir of phenotypic variation not present in the germplasm of cultivated species and thus have great potential for crop improvement. However, issues of genetic ...compatibility often interfere with effective utilization of crop wild relative taxa. Among chickpea (Cicer arietinum L.) crop wild relatives, Cicer echinospermum P.H. Davis is the sole species in the secondary genepool, being partially compatible with the primary genepool that is composed of the cultigen and its progenitor wild species Cicer reticulatum Ladizinksy. We report results from genetic studies among interspecific hybrids between cultivated chickpea and accessions from six recently identified wild C. echinospermum sites in southeastern Turkey, encompassing the known genetic diversity of the secondary genepool. Our studies indicate that both hybrid sterility and hybrid breakdown occur and are associated with distinct subgroups of C. echinospermum. Analysis of early‐generation progenies suggests that both hybrid sterility and hybrid breakdown are conditioned by one to few genetic loci. These results clarify ambiguity in the nature of the hybridization barriers of reduced fertility in interspecific crossing of cultivated chickpea with C. echinospermum and should foster a more systematic and wider use of C. echinospermum for base broadening of cultivated chickpea.
Summer setback, which is defined as a decline in academic achievement over the summer months, occurs in many academic areas but seems especially problematic in reading. We assessed students from a ...midwestern parochial school serving predominantly students from a low-socioeconomic status background for their reading achievement before they left for summer break in the spring and again at the start of the school year in the fall. We observed a significant decline in reading achievement. However, we observed a reduction in the effects of the setback in students who participated in a 3-week summer reading program that incorporated evidence-based reading fluency and comprehension strategies. Participants in the program significantly increased their reading achievement over the course of the summer program and started the school year with percentile ranks in reading that were higher than those at the end of the previous school year.
Student reading skills are below grade level in many schools and professionals are constantly searching for new ideas to enhance reading curricula. To address this problem in one elementary school, a ...parent/school reading programme was implemented. Parents were encouraged to increase the amount of time spent reading with their children at home and the school provided easily accessible reading materials, suggestions for encouraging reading at home, prizes and special activities. Programme participants demonstrated a higher increase in reading rate and accuracy than the matched peers. Prior to implementation and at the end of the reading programme, parents and students who chose to participate in the programme reported positive attitudes toward reading together. Implications of these results are discussed and an emphasis is placed on expanding research in the area.
The goals of the present study were to identify the impact particular stereotyped toys have on young children's complexity of play; to identify how these behaviours may influence children's cognitive ...development using play assessment; and to ascertain the toys that would be most appropriate for use in play assessment sessions. A total of 30 children who ranged in age from 18-47 months were observed playing for 30 minutes in a playroom. Analyses revealed that higher levels of play complexity were only manifested when children played with female stereotyped toys. The implications for practitioners of this and other findings are discussed.
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