The objective of present study was to examine the presence of variation in relative cell injury percentage (RCI%), as a measure of heat tolerance in sample of G. hirsutum germplasm and also to investigate genetic basis, if any, of RCI% under heat stress. For this purpose, response of 70 cotton varieties/lines was studies to optimum and high temperature, and RCI% was measured at reproductive stage. Data showed differing responses of the germplasm to the two temperature regimes. On the basis of similarities MNH 552, FH 100 and NIAB 111 were screened out as tolerant whilst Cedix ST-362 (GL), LRA 5166 and 4F were identified as susceptible varieties. Three sets of crosses involving tolerant × susceptible varieties were made according to generation mean technique. Six generations of each cross was field planted under optimum and high temperature and at reproductive stage RCI% was again measured. Genetic analysis of the data showed the predominant effect of additive component in the inheritance of RCI% under both the temperature regimes and consequently estimates of h2ns were high in three crosses. These estimates were used to calculate response to selection in F3 population that appear to be encouraging. The results of present investigation suggest that RCI% could be used as effective selection criteria for selecting the plants with lower value of RCI%.
Generation mean analysis Gossypium hirsutum L. heat tolerance relative cell injury variability
The objective of present study was to examine the presence of variation in relative cell injury percentage
(RCI%), as a measure of heat tolerance in sample of G. hirsutum germplasm and also to investigate genetic
basis, if any, of RCI% under heat stress. For this purpose, response of 70 cotton varieties/lines was studies to
optimum and high temperature, and RCI% was measured at reproductive stage. Data showed differing
responses of the germplasm to the two temperature regimes. On the basis of similarities MNH 552, FH 100 and
NIAB 111 were screened out as tolerant whilst Cedix ST-362 (GL), LRA 5166 and 4F were identified as
susceptible varieties. Three sets of crosses involving tolerant × susceptible varieties were made according to
generation mean technique. Six generations of each cross was field planted under optimum and high
temperature and at reproductive stage RCI% was again measured. Genetic analysis of the data showed the
predominant effect of additive component in the inheritance of RCI% under both the temperature regimes
and consequently estimates of h2
ns were high in three crosses. These estimates were used to calculate response
to selection in F3 population that appear to be encouraging. The results of present investigation suggest that
RCI% could be used as effective selection criteria for selecting the plants with lower value of RCI%.
Generation mean analysis Gossypium hirsutum L. heat tolerance relative cell injury variability
Primary Language | English |
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Journal Section | Articles |
Authors | |
Publication Date | May 23, 2017 |
Published in Issue | Year 2017 Volume: 22 Issue: 1 |
Turkish Journal of Field Crops is published by the Society of Field Crops Science and issued twice a year.
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Ege University, Faculty of Agriculture,Department of Field Crops
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