Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 25, Problem 13PDQ
The mean and variance of plant height of two highly inbred strains (P1 and P2) and their progeny (F1 and F2) are shown here.
Calculate the broad-sense heritability (H2) of plant height in this species.
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The phenotypic data below are the shoot lengths of 25 F1 and 25 F2 rice plants atseedling stage, produced from the cross of IR29 and Hasawi rice varieties. The mean lengths of the shoot from IR29 and Hasawi are 23.1 cm and 46.7 cm, respectively. Tabulate and plot the frequency distributions of the F1 and F2 generations. From each distribution calculate the mean, the variance,and the standard error of the mean. What is the main difference between F1 and F2 distributions?
Formulas needed:Range (R) = maximum – minimum (Use the same no. of decimal places as original data.)No. of phenotypic classes (K) = 1 + 3.3logn (Round up answer to an integer. Number may still be increased or decreased as needed.)n = total no. of valuesClass interval (CI) = R/K (Use the same no. of decimal places as original data.)
The mean, standard deviation, variances, and coefficient of variance of plant height from two rice plants (P1 and P2) and their progeny (F1 and F2) and a backcross generation (P1 x F1) are shown below. Explain the possible reasons for the observed differences in the sample means. Account for the differences in the sample means of P1 and P2. Similarly, account for the differences in the sample means of the F1 and F2. Compare the difference in the parental generations with that in the filial generations.
The mean and variance of plant height of two highly inbred strains (P1 and P2) and their progeny (F1 and F2) are shown here. Strain Mean (cm) Variance P1 34.2 4.2 P2 55.3 3.8 F1 44.2 5.6 F2 46.3 10.3 Calculate the broad-sense heritability (H2) of plant height in this species.
Chapter 25 Solutions
Concepts of Genetics (12th Edition)
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- The mean and variance of Corolla length in two highly strains of tabacco and their progeny are shown in the following table and one parent (P1) have a short corolla the other parent (P2) have a long corolla calculate the broad sense heritability (H) corolla length in the plant Strain mean (mm). Variance (mm) P1 short 40.47. 3.12 P2 long. 93.75. 3.87 F1 (P1×P2). 63.90 4.74 F2(F1×F2). 68.72. 47.76arrow_forwardWhat is the heritability of corolla length?arrow_forwardOrchids come in an amazing variety of colours. Scientists found that cloned Cattleya orchids have a phenotypic variance of 14, while wild Cattleya orchids have a phenotypic variance of 29. What is the broad-sense heritability of these orchids?arrow_forward
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