To review:
The outline of a research program for a crop species like wheat, rice or barley, that would utilize the genetics of flower development, to make a more productive variety.
Introduction:
The diploid barley (Hordeum vulgare L.,) and allohexaploid wheat (Triticum aestivum L.,) are the two important temperate cereal crop species. The early flowering is a vital feature that affects the grain yield and quality in both of these species. Direct identification of flowering genes and their molecular chracterization is a difficult task, as the genome size is large and complex. The use of bioinformatic approach for the prediction of flower related genes in barley and wheat compare to190 known Arabidopsis flowering genes may be helpful for the genetic information.
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Biology: The Dynamic Science (MindTap Course List)
- Suppose a flower had normal expression of genes A and Cand expression of gene B in all four whorls. Based on the ABChypothesis, what would be the structure of that flower, startingat the outermost whorl?(A) carpel-petal-petal-carpel(B) petal-petal-stamen-stamen(C) sepal-carpel-carpel-sepal(D) sepal-sepal-carpel-carpelarrow_forwardConsider the following hypothetical gene a plant g&T produces a protein that impacts the stem length. There are two alleles for GT which produces long stem and tea little tea which results in short stint. Which of the following genome types above would have a different pheno type? And what would the phenotype be for the genotype?arrow_forwardMonoecious plants such as corn have either staminate or carpelate flowers. Knowing what you do about the molecular mechanisms of floral development, which of the following might explain the development of single-sex flowers? a. Expression of B-type genes in the presumptive carpel whorl will generate staminate flowers. b. Loss of A-type genes in the presumptive petal whorl will allow C-type and B-type genes to produce stamens instead of petals in that whorl. c. Restricting B-type gene expression to the presumptive petal whorl will generate carpelate flowers. d. All of the choices are correct.arrow_forward
- Genetic variation is indispensable for crop improvement. Discuss how heritable variation can be generated in crop plants?arrow_forwardList at least three different properties that have been acquired by crop plants via genetic engineering.arrow_forwardWhat will be the flower structure of a plant in which expression of the following genes is inhibited in the specified whorls? a. Expression of class B genes is inhibited in the second whorl, but not in the third whorl. b. Expression of class C genes is inhibited in the third whorl, but not in the fourth whorl. c. Expression of class A genes is inhibited in the first whorl, but not in the second whorl. d. Expression of class A genes is inhibited in the second whorl, but not in the first whorl.arrow_forward
- INTERPRET DATA Flower parts are arranged in four concentric circles: sepals, petals, stamens, and carpel. According to the ABC model of floral organ development in Arabidopsis, class A genes are needed to specify sepals, the A and B genes to specify petals, the B and C genes to specify stamens, and class C genes to specify the carpel. If a mutation occurs in one of the B genes, rendering it inactive, what will the resulting flowers consist of?arrow_forwardWhat types of flower structures would you expect to see in whorls 1 through 4 of a mutant plant that failed to produce both class A and class B gene products? a. Carpels, stamens, stamens, carpels b. Sepals, sepals, carpels, carpels c. Sepals, sepals, sepals, sepals d. Carpels, carpels, carpels, carpelsarrow_forwardIn roses, the synthesis of red pigment is by two steps ina pathway, as follows:colorless intermediate gene Pmagenta intermediate red pigment gene Qa. What would the phenotype be of a plant homozygousfor a null mutation of gene P?b. What would the phenotype be of a plant homozygousfor a null mutation of gene Q?c. What would the phenotype be of a plant homozygousfor null mutations of genes P and Q?d. Write the genotypes of the three strains in parts a, b,and c.e. What F2 ratio is expected from crossing plants fromparts a and b? (Assume independent assortment.)arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage LearningBiology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning