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Inheritance of Resistance to Isolates of Fusarium oxysporum var. batatas in Burley Tobacco 1 , 3
Author(s) -
Jones J. L.,
Gupton C. L.,
Terrill T. R.
Publication year - 1972
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1972.0011183x001200040042x
Subject(s) - diallel cross , biology , fusarium oxysporum , heritability , epistasis , nicotiana tabacum , inheritance (genetic algorithm) , horticulture , botany , genetics , gene , hybrid
Two genetic experiments designed for diallel analysis and generation means analysis were utilized to study the nature of gene action conditioning resistance to four isolates of Fusarium oxysporum var. batatas in burley tobacco ( Nicotiana tabacum L.). Plants were evaluated for their reaction as seedlings in the greenhouse. The diallel experiment, consisting of all possible crosses among five burley tobacco parents, was analyzed according to the procedures of Griffing and Jinks‐Hayman. The generation means experiment included the P 1 , P 2 , F 1 , F 2 , P 1 F 1 , and P 2 , F 1 generations of the cross between ‘Kentucky 12’ and ‘Judy's Pride.’ General combining ability mean squares and Hayman's D (additive component) were highly significant for each isolate. There was close association between the ranking of the parental entries for general combining ability effects and parental performance per se , indicating that predictions of F l hybrid performance can be made from parental performance. The generation means analyses showed additive gene effects to be most important and dominance and epistatic effects to be relatively unimportant in the inheritance of resistance to each of the isolates and their mixture. Narrow‐sense heritability estimates indicated that rapid genetic advances through selection could be made for resistance to Fusarium wilt.