Correlation and genetic component studies for peduncle length affecting grain yield in wheat

Abstract

The main emphasis of wheat breeders is to strive for genetically more stable, high yielding varieties than the pre-released ones to sustain the yield. Yield improvement efforts should be made while considering all contributing factors that can improve it. The role of peduncle length influencing yield and other supporting features are barely taken into consideration, and still not fully elucidated. Understanding and utilization of plant natural response will help to develop genetically and morphologically more adaptable genotypes for ever-increasing feed demand. The present research was conducted to assess the nature of gene action controlling inheritance of these traits coupled with manipulating role for yield traits. In this regard, 27 F1 hybrids were developed by crossing 9 female and 3 male parents using Line × Tester (L×T) mating design and evaluated for yield and its related traits. The analysis of variance for combining ability pointed out the presence of broad genetic variation in material with highly heritable nature. Correlation studies portrayed strong phenotypic and genotypic association between peduncle length, plant height, flag leaf area, spike length and grain weight/plant. Strong association of peduncle length with other yield contributing traits may be utilized as an indirect selection criterion for yield improvement. Hence, short stature and high yielding varieties can be developed by controlling the favourable genes for peduncle length. All yield related traits except peduncle length, spike length, and flag leaf area were controlled by dominant genes. Selection in the later generations for peduncle length may indirectly improve yield.

Combining Ability and Gene Action of Half Diallel Crosses in Bread Wheat (Triticum aestivum L.)

“…While the Expected Genetic advance was low for all traits, this is probably due to the low narrow inheritance of those traits. This result agreed with [25,[29][30][31][32][33].…”

Estimation of Heritability and Genetic Variability in Hexaploid Wheat (Triticum aestivum L.)

“…The Gs% at 5% level of significance was found to be maximum for grain yield/plant followed by grains per plant, tillers per plant, harvest index (HI) and biological yield/ plant. Such characters also showed high heritability estimates, similar findings Farooq et al (2019), Naik et al (2015) and Oguz et al (2011).…”

New selection strategies for determining the traits contributing to increased grain yield in wheat (Triticum aestivum L.) under aluminum stress

“…Peduncle length is an important yield attributing trait which may be used like an indirect selection criterion for performance improvement in wheat breeding programs. However, this trait can also be vulnerable to environmental stresses (Farooq et al 2018). The roles of peduncle in plants during abiotic stress resistance (induced by factors such as heat, drought and heavy metals) majorly include photosynthesis and stem reserve remobilization with high grain yield (Modarresi et al 2010).…”