RT Journal
T1 Generation Mean Analysis for different Seedling Morpho-Physiological Parameters in Maize under different Regimes of Water
A1 Usman Saleem
A1 Naeem Akhtar
A1 Salman Saleem
A1 Sadia Kaukab
A1 Muhammad Yaseen
A1 Hafiz Muhammad Asadullah
A1 Ijaz ul Hassan
JF Journal of Animal and Plant Sciences
JO JAPS
SN 1018-7081
VO 34
IS 2
SP 415
OP 424
YR 2024
FD 2024/03/31
DO DOI https://doi.org/10.36899/JAPS.2024.2.0727
AB <p style="text-align: justify;">Maize being the leading cereals grain crop is widely used throughout the world including Pakistan. About thirty three percent of world's arable land experiences deficiency of water and greatest harvest yields are frequently decreased by dry spell. The current research was considered to examine the genetic traits governing the drought tolerance of morphological and physiological parameters during the seedling stage. The breeding stock consisted of two parental lines, YP12 and US-17 with divergent traits with respect to their ability to bear water shortage and their succeeding generations F<sub>1</sub> and F<sub>2</sub> along with back crosses BC<sub>1</sub> and BC<sub>2</sub> were utilized as experimental material.<sub> &nbsp;</sub>The combined analysis of variance for all traits with respect to parents (P<sub>1</sub> and P<sub>2</sub>) and their fundamental generations (F<sub>1</sub>, F<sub>2</sub>, BC<sub>1</sub> and BC<sub>2</sub>) yielded significant differences among generations and water treatments suggesting the presence of wide range of genetic variability. Relative water contents, leaf water potential, osmotic potential and turgor potential decreased under water stress environment. All morphological parameters like root and shoot length, fresh root and shoot weight and dry root and shoot weight exhibited a decrease in response to water stress. Dry shoot weight, turgor potential and osmotic potential under water stress has additive nature suggesting that early selection based on one of these traits may also compliment the other resulting in development of better yielding maize material for stress tolerance. Further, root characters such as root length, fresh and dry weight can play a crucial role in efficiently evaluating the maize genotypes to drought stress during the seedling stage.</p>
K1 Epistasis, Dominance, Genetic basis, Maize, Drought tolerance
PB Pakistan Agricultural Scientists Forum
LK https://thejaps.org.pk/AbstractView.aspx?mid=2023-JAPS-1168