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Title: Studies on heat tolerance in garden pea (Pisum satvum L.)
Authors: Oinam Kumar Singh
Guide/Chairperson: A B, Pal
Keywords: heat tolerance
garden pea
Issue Date: 1991
Year of Submission: 1991
Abstract: Twelve garden pea lines viz., UN-5-29(P), IHR575, UN-5-29(S), RPN-34, IHR-544, RPD-9-1 (P), UN-57(G),RPD-9-1(S) (early lines), IHR-476, Bonneville, FC-1-32-1-1-40 and IHR-570 (mid season lines) were evaluated for growth and yield parameters during rabi and summer seasons and the relative performance of the lines at high temperature, its effect on yield and yield components and the role of chemical constituents in offering heat tolerance were studied. High temperature was found to affect the growth and consequently the yield during the summer season. All the growth and yield parameters decreased drastically when the growing temperature reached 35 °C at maximum and 17 °C at minimum. At this temperature shelling percentage increased in the case of early lines but decreased in the mid season lines. Number of days taken for 1st flowering was reduced in the early lines whereas it increased in the mid season lines at high temperatures. Chemical constituents such as starch, protein and sugar also decreased during summer to the extent of 2.02 to 48.09%. Both positive as well as negative significant correlations were found among many of the characters during summer than rabi. In general, there was genotypic variation in heat tolerance in garden pea lines. Lines with long duration had less tolerance to heat as compared to short duration lines. Chemical constituents of the plants were also altered by temperature with wide variations among the lines. Among the lines tested, IHR-544 and IHR-575 were found to be the most heat tolerant lines and were most suitable for cultivation during the summer season.
URI: http://www.erepo.iihr.ernet.in/handle/123456789/403
University in which they received their degree: University of Agricultural Sciences, Bangalore
Degree Level: M.Sc

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