Genetic analysis of grain yield and leaf chlorophyll content in common wheat

2009 ◽  
Vol 37 (4) ◽  
pp. 499-511 ◽  
Author(s):  
K. Zhang ◽  
Y. Zhang ◽  
G. Chen ◽  
J. Tian
Keyword(s):  
Genetic Analysis ◽  
Grain Yield ◽  
Chlorophyll Content ◽  
Common Wheat ◽  
Leaf Chlorophyll Content ◽  
Leaf Chlorophyll

scholarly journals Effect of Variety and Planting Arrangement on Weed Control and Yield Performance of Transplanted Aman Rice

2021 ◽  
pp. 25-37
Author(s):  
Vashkar Adhikary ◽  
Mehedi Hasan ◽  
Ashraful Alam Fakir ◽  
Sonia Sultana ◽  
Md. Moshiur Rahman ◽  
...  
Keyword(s):  
Grain Yield ◽  
Chlorophyll Content ◽  
Weed Control ◽  
Panicle Length ◽  
Yield Performance ◽  
Leaf Chlorophyll Content ◽  
Weed Interference ◽  
Spad Value ◽  
Leaf Chlorophyll ◽  
Plot Design

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during June to November 2016 in order to find out the effect of variety and planting arrangement on weed control and yield performance of transplanted Aman rice. The experiment consisted of four varieties viz., Binadhan-7, Binadhan-12, Binadhan-17 and Binadhan-16 and five planting arrangement viz. 25cm × 20cm, 25cm × 15cm, 20cm × 20cm, 20cm × 15cm and 15cm × 15cm. The experiment was laid out in Split Plot Design with three replications. Results indicated that the highest weed density (90.93 m-2), weed biomass (131.87 gm-2), leaf chlorophyll content (SPAD value) (40.02), sterile spikelets panicle-1 (76.86) ,% sterility panicle-1 (28.66), grain yield (4.51 t ha-1) and straw yield (4.63 t ha-1) were obtained from Binadhan-17. The variety Binadhan-7 showed the best performance in respect of number of total tillers hill-1 (11.06), number of effective tillers hill-1 (10.12) compared to the other varieties used in the study. The highest leaf chlorophyll content (SPAD value) (36.48), plant height (99.72 cm), panicle length (22.03 cm), number of total tillers hill-1 (10.21) and number of effective tillers hill-1 (9.45) were found at 25 cm × 20 cm planting arrangement. The highest grain yield (4.31 t ha-1) was recorded from 20cm × 15cm planting arrangement. The interaction between variety and planting arrangement showed numerically higher grain yield (5.38 t ha-1) from Binadhan-7 at 20cm × 15cm planting arrangement, whereas the lowest grain yield (2.61 t ha-1) was achieved from the variety Binadhan-12 at 15cm × 15cm planting arrangement. It can be concluded that Binadhan-7 at 20cm × 15cm planting arrangement may be used for achieving the best yield with less weed interference in Aman season.

scholarly journals Evaluation of exotic wheat (Triticum aestivum L.) genotypes for heat tolerance on the basis of physiological phenotyping

2018 ◽  
Vol 16 (3) ◽  
pp. 457-463
Author(s):  
Kaji Md. Wayaz Hossain ◽  
Sharif Ar Raffi
Keyword(s):  
Grain Yield ◽  
Chlorophyll Content ◽  
Heat Tolerance ◽  
Canopy Temperature ◽  
Grain Weight ◽  
Leaf Chlorophyll Content ◽  
Leaf Chlorophyll ◽  
Canopy Temperature Depression ◽  
Membrane Thermostability ◽  
Temperature Depression

Plant physiological parameters such as membrane thermostability, canopy temperature depression, leaf chlorophyll content and yield related traits like no. of spikelets per spike, no. of grains per spike, 200-grain weight and grain yield of 18 wheat genotypes were carried out to assess for heat tolerance. Performances of all the genotypes were found to have significant differences for all the traits except canopy temperature depression. But, canopy temperature depression with some other traits like leaf chlorophyll content, no. of grains per spike, 200-grain weight and grain yield per plant demonstrated significant differences when it grown in heat stress condition. In general, genotypes with higher leaf chlorophyll content and enhanced membrane thermostability demonstrated higher 200-grain weight or grain yield. Besides, in spite of having heat tolerant traits, several genotypes performed poor due to their poor genotypic potential. The present investigation has successfully isolated several genotypes viz. H024, H023, H022 and H018 with desirable traits related to heat tolerance based on overall performance while grown under heat stress. These genotypes can be used as gene source for future breeding program to improve heat tolerance of the local wheat cultivars. J. Bangladesh Agril. Univ. 16(3): 457–463, December 2018

scholarly journals Genetic Analysis of Cadmium Tolerance And Exploring Its Inheritance Nature In Bread Wheat

2021 ◽  
Author(s):  
Hassan A. Awaad ◽  
Ahmed M. Alzohairy ◽  
Amgad M. Morsy ◽  
Ehab S.A. Moustafa ◽  
Elsayed Mansour
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Chlorophyll Content ◽  
Bread Wheat ◽  
Flag Leaf ◽  
Proline Content ◽  
Sensitivity Index ◽  
Leaf Chlorophyll Content ◽  
Cd Tolerance ◽  
Leaf Chlorophyll

Abstract Cadmium (Cd) is a nonessential and extremely toxic element that destructively impacts agricultural production. Accordingly, developing tolerant-Cd as well as low-grain Cd genotypes is considered a promising approach to cope with the pollution problem. The current study aimed at understanding inheritance nature of Cd tolerance and detect Cd-tolerant and low-grain Cd genotypes in bread wheat. Six parents were selected based on their Cd tolerance and were genotyped using triple-RAPD and ISSR markers to investigate their genetic diversity. The selected parents were crossed and the realized F1s were selfed to produce F2 populations and were backcrossed with their own parents to produce BC1 and BC2 populations. Six populations for each cross comprised P1, P2, F1, F2, BC1 and BC2 were evaluated in two adjacent experiments under non-Cd stressed and Cd-stressed conditions. Significant positive relative and standard heterosis were detected for flag leaf area, leaf chlorophyll content, proline content, Cd concentration and grain yield/plant under Cd-stressed condition. Dominance gene effect was more pronounced in controlling the evaluated traits in most cases. F values coupled with F/√H×D ratio were positive for Cd concentration and Cd sensitivity index in the three crosses under both conditions. Heritability estimates from offspring regression were high (< 50%) for flag leaf area, leaf chlorophyll content, proline content, Cd concentration while, moderately low for grain yield/plant and Cd sensitivity index. Prediction results revealed to high transgressive segregates and exceeding F1 with best-inbred line (P max) that have all favorable alleles were obtained from 3rd cross for flag leaf area, low Cd concentration and Cd sensitivity index under Cd-stressed conditions.

scholarly journals Determination of barley nitrogen status with chlorophyll meter for high β-amylase in grains

1995 ◽  
Vol 4 (5-6) ◽  
pp. 495-501
Author(s):  
Jari Peltonen ◽  
Ari Virtanen ◽  
Jaakko Helenius ◽  
Juha Suopelto ◽  
Kari Kittilä ◽  
...  
Keyword(s):  
Grain Yield ◽  
Chlorophyll Content ◽  
Amylase Activity ◽  
Spring Barley ◽  
N Availability ◽  
Hordeum Vulgare L ◽  
Leaf Chlorophyll Content ◽  
Chlorophyll Meter ◽  
Leaf Chlorophyll

The production of β-amylase is of great importance in two-rowed spring barley cv. Kymppi (Hordeum vulgare L.) in the Finland, where long-day conditions favour high enzyme activities. Nitrogen (N) fertilization of a crop is the main means of manipulating barley β-amylase activity for industrial purposes. In this study, leaf chlorophyll content determined with a portable chlorophyll meter (Minolta SPAD-502) in the field, was used to predict N availability of cv. Kymppi for β-amylase production. Critical chlorophyll meter readings (SPAD values) were calculated from data deriving from experiments with various N fertilizer levels using the Cate-Nelson procedure. According to the results of this study it can be stated that the critical SPAD values at pollination (i.e. pollen grains on well-developed stigmatic hairs, GS 52-58) are 37 SPAD units for grain yield and 41 SPAD units for β-amylase activity. The optimum grain yield occurred at 41 SPAD units and optimum P-amylase activity was reached at 45 SPAD units. Determination of leaf chlorophyll content using the chlorophyll meter led to more appropriate fertilizer application recommendations and subsequently increased β-amylase activity in grains. Grain protein concentration could be an effective diagnostic tool for post-harvest evaluation of grain β-amylase activity in cv. Kymppi.

scholarly journals RIL-StEp: epistasis analysis of rice recombinant inbred lines (RILs) reveals candidate interacting genes that control seed hull color and leaf chlorophyll content

2021 ◽  
Author(s):  
Toshiyuki Sakai ◽  
Akira Abe ◽  
Motoki Shimizu ◽  
Ryohei Terauchi
Keyword(s):  
Chlorophyll Content ◽  
Recombinant Inbred ◽  
Complex Traits ◽  
Genetic Architecture ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
Gene Interactions ◽  
Leaf Chlorophyll Content ◽  
Leaf Chlorophyll ◽  
Seed Hull

Abstract Characterizing epistatic gene interactions is fundamental for understanding the genetic architecture of complex traits. However, due to the large number of potential gene combinations, detecting epistatic gene interactions is computationally demanding. A simple, easy-to-perform method for sensitive detection of epistasis is required. Due to their homozygous nature, use of recombinant inbred lines (RILs) excludes the dominance effect of alleles and interactions involving heterozygous genotypes, thereby allowing detection of epistasis in a simple and interpretable model. Here, we present an approach called RIL-StEp (recombinant inbred lines stepwise epistasis detection) to detect epistasis using single nucleotide polymorphisms in the genome. We applied the method to reveal epistasis affecting rice (Oryza sativa) seed hull color and leaf chlorophyll content and successfully identified pairs of genomic regions that presumably control these phenotypes. This method has the potential to improve our understanding of the genetic architecture of various traits of crops and other organisms.

Variability of Leaf Chlorophyll Content in a Population of Sassafras

1990 ◽  
Vol 117 (2) ◽  
pp. 167 ◽  
Author(s):  
Amrita G. de Soyza ◽  
Dwight T. Kincaid ◽  
Carlos R. Ramirez
Keyword(s):  
Chlorophyll Content ◽  
Leaf Chlorophyll Content ◽  
Leaf Chlorophyll
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