%0 Journal Article
%T Estimation of Variability, Heritability and Genetic Advance for Phenological, Physiological and Yield Contributing Attributes in Wheat Genotypes under Heat Stress Condition
%A Md. Mukhtar Hossain
%A Md. Abul Kalam Azad
%A Md. Shamiul Alam
%A Touria El-Jaoual Eaton
%J American Journal of Plant Sciences
%P 586-602
%@ 2158-2750
%D 2021
%I Scientific Research Publishing
%R 10.4236/ajps.2021.124039
%X The investigation was carried out in focusing the
genetic variability for different traits of wheat influenced by heat tolerance
mechanism to find out relationships among phenological, physiological and yield
contributing traits. Spring wheat cultivar of 25 genotypes were selected and
cultivated under late sowing condition at the Regional Wheat Research
Institute, Shympur, Rajshahi, Bangladesh from December, 2016 to April, 2017.
Significant variability among the genotypes exposed for different traits
related to heat tolerance. Results showed that the genotypes G24, G10, G01,
G13, G16, G25 and G14 </span><span style=\"font-family:Verdana;\">ranked as better
category considering maximum number of traits in mean</span><span style=\"font-family:Verdana;\"> performance
indicating their tolerance to heat stress under late sowing condition.
Phenotypic variances (&lt;i&gt;&amp;sigma;&lt;sub&gt;g&lt;/sub&gt;&lt;sup
style=\"margin-left:-6px;\"&gt;2&lt;/sup&gt;&lt;/i&gt;) of all traits
were greater than those of genotypic variances (&lt;i&gt;&amp;sigma;&lt;sub&gt;g&lt;/sub&gt;&lt;sup
style=\"margin-left:-6px;\"&gt;2&lt;/sup&gt;&lt;/i&gt;). The same
trends were also found in their co-efficient of variances. The phenotypic
co-efficient of variances (PCV) of all traits were greater compare to those of
genotypic co-efficient of variances (GCV) and their values were closer to each
other. The heading days (HD), canopy temperature at vegetative stage (CT</span><sub><span style=\"font-family:Verdana;\">vg</span></sub><span style=\"font-family:Verdana;\">),
canopy temperature at grain filling stage </span><span><span style=\"font-family:Verdana;\">(CT</span><sub><span style=\"font-family:Verdana;\">gf</span></sub><span style=\"font-family:Verdana;\">),
biomass, plant height (PH), spike/m</span><sup><span style=\"font-family:Verdana;\">2</span></sup><span style=\"font-family:Verdana;\"> (SPM), spikelet/spike (SPS), </span></span><span style=\"font-family:Verdana;\">grain/</span></span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:Verdana;\">spike (GPS), thousand grain
weight (TGW) and yield exhibited higher heritability (&lt;i&gt;</span><span style=\"font-family:Verdana;\">h&lt;sub&gt;b&lt;/sub&gt;&lt;sup
style=\"margin-left:-6px;\"&gt;2&lt;/sup&gt;</span><span style=\"font-family:&quot;\"><span style=\"font-family:Verdana;\">&lt;/i&gt;)
estimated under irrigated late sowing (ILS) condition. Under the same ILS
condition SPAD, SPM, SPS, GPS, TGW and yield showed moderate to high genetic
advance (GA) obtained through computing their mean percentage (%)
%K Wheat Genotype
%K Variability
%K Heritability
%K Genetic Advance
%K PCV (Phenotypic Co-Efficient of Variation)
%K GCV (Genotypic Co-Efficient of Variation)
%K Heat Tolerance
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=108547