International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 1
First page : (225) Last page : (233)
Article doi: http://dx.doi.org/10.18782/2320-7051.6170

Evalution of Bread Wheat (Triticum aestivum L.) Genotypes for Heat Tolerance under Timely and Late Sown Conditions

Ramanuj, B. D.*, Delvadiya, I. R., Patel, N. B. and Ginoya, A. V.
Department Of Genetics And Plant Breeding, College Of Agriculture, Junagadh Agricultural University, Junagadh-362 001, Gujarat, India
*Corresponding Author E-mail: bhargavramanuj0@gmail.com
Received: 06.01.2018  |  Revised: 3.02.2018   |  Accepted: 8.02.2018  

 ABSTRACT

The present study was carried out to assess genetic variability, correlation coefficient and path coefficient analysis with respect to heat tolerance in 50 genotypes of aestivum wheat grown in a Randomized Block Design with three replications under normal and late sowing conditions at the Wheat Research Station, Junagadh Agricultural University, Junagadh during rabi 2015-16. The observations were recorded on 13 characters viz., days to heading, days to maturity, grain filling period (day), plant height (cm), number of effective tillers per plant, length of main spike (cm), number of grains per main spike, number of spikelets per main spike (g), grain yield per plant (g), biological yield per plant (g), harvest index (%), 100 grain weight (g), chlorophyll content (CHLa & CHL21), canopy temperature depression (CTDvg & CTDgf) (°C) and heat sensitivity index. The final conclusion that can be reached from variability, correlations and path coefficient analysis with respect to heat tolerance is that under normal sowing condition with harvest index, biological yield per plant, 100-grain weight, length of main spike and plant height, while under late sowing condition with harvest index, biological yield per plant, plant height and length of main spike found the most important component characters. Hence, these traits should be considered as selection criteria for yield improvement in wheat.

Key words: Heat tolerance, Correlation, Path analysis, Variability parameters, Triticum

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Ramanuj, B.D., Delvadiya, I.R., Patel, N.B. and Ginoya, A.V., Evalution of Bread Wheat (Triticum aestivum L.) Genotypes for Heat Tolerance under Timely and Late Sown Conditions, Int. J. Pure App. Biosci.6(1): 225-233 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6170