University of California Publications in Botany
University of California Publications in Botany
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5, No. 3, pp. 169-188 Issued January 9, 1913 QUANTITATIVE STUDIES OF INHERITANCE IN NICOTIANA HYBRIDS. II.
BY THOMAS HARPER GOODSPEED A preliminary report on the inheritance in Pg of flower size in hybrids produced from three varieties of Nicotiana (acuminata, and notes on certain sterile hybrids of N. Tdbacum varieties and N, sylvestris together with remarks on the present status of the **unit character" conception in studies of heredity.
In a previous report (Goodspeed, 1912) on the inheritan...ce of flower size in P^ hybrids of Nicotiana acuminata varieties the following points were noted: (1) the parental varieties, (varieties I, II and III) bore flowers during two seasons which •showed small fluctuation in corolla diameter and were definitely set apart from one another in respect to this character, i.e., there was no intergrading of one flower size variety into another; (2) the parental varieties were distinguished from one another almost solely in respect to this flower-size character; (3) the results of the measurements of flower size in P, showed that the fluctua- tion in corolla diameter was practically twice as great and often nearly three times as great in this generation as in the pure bred parents grown in either of the two years during which their flowers were measured, and (4) the measurements of the corolla diameters of the flowers on the plants of each group of hybrids gave an average diameter for each group which was practically the same as the calculated average between the corolla diameters of the corresponding two parents — i.e., each of the flve average Digitized by Google 200 University of California Publications in Botany [Vol.
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To quickly assess the difficulty of the text, read a short excerpt:
5, No. 3, pp. 169-188 Issued January 9, 1913 QUANTITATIVE STUDIES OF INHERITANCE IN NICOTIANA HYBRIDS. II.
BY THOMAS HARPER GOODSPEED A preliminary report on the inheritance in Pg of flower size in hybrids produced from three varieties of Nicotiana (acuminata, and notes on certain sterile hybrids of N. Tdbacum varieties and N, sylvestris together with remarks on the present status of the **unit character" conception in studies of heredity.
In a previous report (Goodspeed, 1912) on the inheritan...ce of flower size in P^ hybrids of Nicotiana acuminata varieties the following points were noted: (1) the parental varieties, (varieties I, II and III) bore flowers during two seasons which •showed small fluctuation in corolla diameter and were definitely set apart from one another in respect to this character, i.e., there was no intergrading of one flower size variety into another; (2) the parental varieties were distinguished from one another almost solely in respect to this flower-size character; (3) the results of the measurements of flower size in P, showed that the fluctua- tion in corolla diameter was practically twice as great and often nearly three times as great in this generation as in the pure bred parents grown in either of the two years during which their flowers were measured, and (4) the measurements of the corolla diameters of the flowers on the plants of each group of hybrids gave an average diameter for each group which was practically the same as the calculated average between the corolla diameters of the corresponding two parents — i.e., each of the flve average Digitized by Google 200 University of California Publications in Botany [Vol.
What to read after University of California Publications in Botany?
You can find similar books in the "Read Also" column, or choose other free books by Berkeley University of California to read onlineMoreLess
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