8-1-6 Rahman et al - INFLUENCE OF SOWING DATES ON THE GROWTH AND YIELD OF WHEAT VARIETIES


INFLUENCE OF SOWING DATES ON THE GROWTH AND YIELD OF WHEAT VARIETIES

M. Rahman, M. Begum, M. S. H. Mandal, H. Mehraj, T. S. Roy and A. K. M.Ruhul Amin

*Corresponding author. E-mail: mshmandal@gmail.com

Abstract
A field experiment was conducted at the Agronomy research field, Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during November 2012 to March 2013 in rabi season with a view to find out the optimum sowing date for maximum growth and yield of wheat varieties. The experiment was carried out with three wheat varieties i.e.  BARI Gom 21, BARI Gom 23 and BARI Gom 24; and five different sowing dates viz. 10th November; 20th November; 30th November; 10th December and 20th December of 2012 following Randomized Complete Block Design (RCBD) with three replications. The results revealed that among the wheat varieties BARI Gom 24 performed best recording the highest grain yield (4.51 t ha-1). On the other hand, November 20th performed better than the other sowing dates showing the highest grain yield (4.81 t ha-1). Gradual decrease of growth parameters, yield attributes and yield were observed when wheat seeds were planted in delay after November 20th. Based on the above findings it may be concluded that wheat seeds of BARI Gom 24 may be sown on 20th November for obtaining maximum grain yield.
Keywords: Wheat, sowing dates, yield
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8-1-5 Ullah et al - COMPARING MODERN VARIETIES OF WHITE MAIZE WITH LANDRACES IN BANGLADESH: PHENOTYPIC TRAITS AND PLANT CHARACTERS


COMPARING MODERN VARIETIES OF WHITE MAIZE WITH LANDRACES IN BANGLADESH: PHENOTYPIC TRAITS AND PLANT CHARACTERS

Md. Jafar Ullah*, M.M. Islam, Kaniz Fatima, M.S. Mahmud, S. Akhter, Jamilur Rahman
and Md. Quamruzzaman

*Corresponding author: jafarullahsau@gmail.com

Abstract
An experiment carried out to evaluate the performance of local maize variety compared to the modern variety. Treatment comprised three modern varieties i.e. Plough-201, Plough-202 and Suvra; and five local landraces i.e. Red, Purple, White, Yellow and Black. Local landraces were sown two times, 5 March 2015 (early) and 10 March 2015 (Late). Results revealed that the modern varieties produced tassel and silk 11. 33 and 20.50 days earlier, respectively along with 28.17 days earlier harvesting days compared to the local ones. The local landraces were bit longer plants (5.02 cm) than the modern varieties. The local landraces had three more leaves per plant (17) compared to that of the modern ones. The stem base of the modern varieties was 20% thicker (9.11 cm stem base circumference) compared to the local landraces. The modern varieties produced cobs at the 7th nodes whereas those of the local varieties almost at the top of the plants (12th nodes). Delayed sowing time of the local landraces resulted in the delayed tasseling and harvesting days by 11 and 23 days, respectively. The variety yellow grained had the longest tasseling days (69 days) whereas the white grained variety the shortest (62 days). The white grained variety had the longest silking days (87.50 days) while the red and black grained the shortest (78.50 days). The yellow grained variety sown in delay had the longest tasseling days (78 days) while red, black and purple sown early had the lowest tasseling days (58 days). The purple grained variety at both the sowing dates and; yellow and white at the late sowing dates produced silk in delay (87-88 days) while others in 71-81 days. The longest variety was the yellow grained showing 213 cm whereas the white grained variety was the shortest (170 cm). The variety white grained had 1.45 to almost three more leaves (17.40 per plant) than others. The thickest stem base circumference was obtained in the black grained one (8.40 cm) and the lowest in the red grained one (6.50 cm). The information derived from this study may be a good source of new allelic diversity that could at least be used for developing different important elite maize materials especially the ones to be produced for fodder purposes.

Keywords: maize variety, landraces, modern maize, hybrid, vegetative growth

J. Expt. Biosci.8(1) January 2018 

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8-1-4 Rowshanara et al - CALLUS INDUCTION ABILITY OF INTROGRESSED BRASSICA GENOTYPES UNDER VARYING SALT STRESS CONDITIONS

CALLUS INDUCTION ABILITY OF INTROGRESSED BRASSICA GENOTYPES UNDER VARYING SALT STRESS CONDITIONS


Authors: Mst. Rowshanara, Nighat Sultana, Md. Asadur Rahman, Lutfur Rahman
and K. M. Nasiruddin5

Corresponding author: rowshan.lima82@gamil.com (Mst. Rowshanara)

Abstract

The experiment was conducted at the Biotechnology Laboratory, Department of Biotechnology, Bangladesh Agricultural University, Mymensingh, during January to May, 2007 to determine the callus induction ability of five genotypes of Brassica at different levels of salt stress set imposing varied concentrations (0, 0.3, 0.6 and 0.9 NaCl) supplemented with 1 mg/1 2, 4-D and 10 mg/1 BAP and 3 mg/1 AgNO3. Shoot tips of five Brassica genotypes (G26, G16, G25, G17 and G24) were cultured in MS media having the varied salt concentrations. Results showed that the percent callus induction of different genotypes varied in different treatments in respect of susceptibility to NaCl. In general, callus weight and size decreased with the increase of salinity level. Among the genotypes and G26 showed more callus induction ability than the other genotypes.

Key words:  Introgressed, Brassica, Callus induction, Salt stress


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8-1-3 Akther et al - EFFECT OF STEAM PASTEURIZATION OF SUBSTRATE ON GROWTH AND YIELD CONTRIBUTING CHARACTERS OF OYSTER MUSHROOM (PLEUROTUS OSTREATUS)

EFFECT OF STEAM PASTEURIZATION OF SUBSTRATE ON GROWTH AND YIELD CONTRIBUTING CHARACTERS OF OYSTER MUSHROOM (PLEUROTUS OSTREATUS)


Authors: K. Akhter* and M. Salahuddin M. Chowdhury
*Corresponding author: khadijaakhter@ymail.com

Abstract

 The experiment was conducted to study the effect of the varying periods of steam pasteurization (2, 3, 4 and 5 hours plus pasteurization in autoclave) along with without pasturization. of substrate on the growth and yield characters of oyster (Pleurotus ostreatus) mushroom at Sher-e-Bangla Agricultural University Mushroom Culture House, during January, 2015 to April, 2015. The growth and yield contributing characters of mushroom were significantly influenced by time duration of pasteurization of substrate. Minimum mycelium running time (7.0 days) was required in autoclaved spawn packets. The highest growth rate (0.96 cm/day) was observed in 3 hours steam treated packets which was statistically similar to autoclaved packets, the lowest time (3 days)  required for primordia  formation, the minimum days (5 days) required for primordia formation to first harvesting, the highest number of primordia was observed in three (3) hours steam pasteurized packets of mushroom. The maximum duration was required (46 days) for total harvesting after stimulation in autoclave sterilized packets. Significantly the highest number of fruiting bodies (49.40) per packet was harvested from five hours steam pasteurized packets. The highest diameter (8.16 cm) of pelius was observed in steam from 3 hours packets and the lowest average length (1.82 cm) of stipe was recorded in autoclaved packets. On the other hand, maximum time (29.00 days) was required for completion of mycelium running, the lowest mycelium run rate (0.36 cm), the highest days required from stimulation to primordia initiation (10.00 days), the lowest number of primordia (23.60), the lowest  number of fruiting bodies (20.40) were observed in unpasteurized packets (control). Steam pasteurization for three hours as well as sterilization of substrate by autoclave gave the better performance among the treatments.

Key word:  Oyster mushroom, steam pasteurization, substrate, growth attributes, yield attributes


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8-1-2 Huda and Siddikee - A SIMPLE METHOD FOR THE ISOLATION OF PROTOPLASTS FROM LEAVES OF NICOTIANA BENTHAMIANA

A SIMPLE METHOD FOR THE ISOLATION OF PROTOPLASTS FROM LEAVES OF NICOTIANA BENTHAMIANA

K. M. K. Huda* and M. A. Siddikee
       *Corresponding author: Email mashnuk@gmail.com


Abstract

Protoplasts are plant cells that lack their cell walls. Isolation of protoplasts from different plant tissues was first reported more than 40 years ago and since then used to study a variety of cellular processes. In this article, a simple protoplast isolation method was developed from the leaves of Nicotiana benthamiana grown in the open air.  The optimum condition for protoplast isolation was established by using 1% cellulose R-10 and 0.3% macerozyme R-10 dissolved in F-PIN solution. The method is simple and easy-to-handle and gives satisfactory yields typically. Two to three leaves of tobacco yielded 5-10x106 intact protoplasts in 2 hr.

Keywords: Isolation; leaves; protoplasts; simple protocol; tobacco

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8-1-1 Shakera et al - NEW PLANT TYPE GENOTYPES IN BRASSICA RAPA L.

NEW PLANT TYPE GENOTYPES IN BRASSICA RAPA L.

Amatullah Shakera*, Md. Shahidur Rashid Bhuiyan, Naheed Zeba, Md. Golam Robbani and Md. Akkas Ali

Corresponding author: email: shakera.sau@gmail.com

Abstract

The experiment was carried out to study the mean performance, heritability and genetic gain of yield and its components and to find out new plant type genotypes of Brassica rapa. A total number of 23 (Twenty three) materials were used in this experiment where three were checks varieties, twenty were F3 and F4 segregating materials. The genotype BARI Sarisha-15 × SAU Sarisha-2 of F3 and F4 population and the widely cultivated check variety BARI Sarisha-15 required almost similar days to mature showing almost similar number of seeds per siliqua and thousands seed weight. The other yield contributing characters e.g. plant height, number of primary branches per plant, number of secondary branches per plant, number of siliqua per plant and siliqua length were recorded higher in BARI Sarisha-15 × SAU Sarisha-2 than the checks. The yield per plant was found higher in the genotype BARI Sarisha-15 × SAU Sarisha-2 than BARI Sarisha-15. The days to maturity, plant height and thousand seed weight were almost same in the genotype BARI Sarisha-15 × SAU Sarisha-3 and BARI Sarisha-15. The genotype BARI Sarisha-15 × SAU Sarisha-3 showed higher number of secondary branches per plant, number of siliqua per plant, siliqua length, number of seed per siliqua and yield per plant than popular variety BARI Sarisha-15. Thousand seed weight and yield per plant had high heritability along with high genetic advance in percent mean. The moderate heritability and high genetic advance in percent mean were recorded for number of secondary branches per plant and number of siliqua per plant indicating that the selection of these traits would be effective. The genotypes BARI Sarisha-15 × SAU Sarisha-3 and BARI Sarisha-15 × SAU Sarisha-2 were chosen as new plant type for their better performance in aspects of yield and yield contributing traits than the popular check varieties.
Key word: Brassica rapa, mean performance, heritability, genetic gain.

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7-2-9 Hannan et al

INFLUENCE OF SEED TREATMENTS ON QUALITY SEED PRODUCTION OF CHICKPEA

A. Hannan*, R. R. Saha, R. Chakma, M.N. Islam and M.A. Hossain

*Corresponding author, E-mail:hsag_04@yahoo.com

Abstract

The experiment was carried out at the research field and laboratory of Seed Technology Division during rabi season of 2013-14 to investigate the effect of different seed treatments on stand establishment, seed yield and quality of chickpea. Five seed treatments were: T1= GA3 50 ppm, T2= GA3 100 ppm, T3=GA3 200 ppm, T4= hydropriming and T5= Control. The maximum seedling emergence (78.00%) and plant population m-2 were obtained from GA3 50 ppm treatment which were at par with that of  hydropriming. Remarkable variation was observed in CGR among the treatments at 60-120 days after emergence and maximum CGR was obtained from GA3 100 ppm and hydropriming treatments. Among the seed treatments, significant differences were recorded in plant height, number of branches plant-1, pods plant-1, seeds pod-1, 100-seed weight and seed yield. Seeds treated with GA3 100 ppm gave the highest seed yield followed by GA3 50 ppm and hydropriming. After harvesting, significantly highest seed germination (95.33%), root length (17.40 cm), seedling dry weight (66.43 mg) and vigour index (6338) were recorded from GA3 50 ppm which was at par with that of GA3 100 ppm.

Key words: Seed treatment, chickpea and hydropriming.

Full volume: 7(2)

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