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Harvest Plus Yield Trial of Wheat (4th Hpyt)

M. M. Hasan
Wheat Research Centre, BARI

M. F. Amin
Wheat Research Centre, BARI

N. C. D. Barma
Wheat Research Centre, BARI

Abstract/ Executive Summary:

Forty nine zinc enriched wheat genotypes from CIMMYT along with check Variety BARI Gom 26 were evaluated in the experimental field of RWRC, BARI, Gazipur in the winter season 2013-14. Genotypes were tested for enriched micronutrient (Zn) concentration, different physiological traits related to heat tolerance and high yield potential under irrigated time sown (ITS) condition. The experimental design was 10 X 5 alpha lattice design with 2 replications. Significant variation was observed for most of the traits studied. E 6 and E 17 could out yielded the check variety whereas few other entries also had good yield potential. Considering different phenological & physiological traits; seed quality & yield potential 16 genotypes E 2, E 6, E 11, E 13, E 17, E 19, E 23, E 25, E 27, E 31, E 32, E 36, E 40, E 45, E 49, and E 50 were selected for further evaluation. Seeds of the selected lines will be tested at standard International laboratory/s for Fe and Zn content and potential micronutrient enriched line/s will be promoted for yield trial across location.

Keywords: Zn-enriched, Wheat, Micronutrient

Location: BARI, Gazipur

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Variety and Species

Commodity: Wheat

Objectives:

The objective of the present study was to evaluate 50 Zn-enriched elite wheat lines develop by CIMMYT and to select suitable high yielding genotypes along with good agronomic background.

Methodology:

The trial was consisted of 50 entries including one check variety BARI Gom-26. The genotypes included in this trial were selected from harvest plus programme and were enriched with Zinc content. The experiment was sown on 26 November, 2013 at Joydebpur. The experiment was laid out in 5 x 10 Alpha-lattice design with two replications. The unit plot size was 5m long with 6 rows spaced at 20 cm. Fertilizers were applied @ N₁₀₀ P₂₇ K₅₀ S₂₀ B₁ kg ha^-1. All the fertilizers and two-third of urea were applied during final land preparation and one-third of urea was top dressed after first irrigation. Three irrigation were applied at 21, 55 and 75 days after sowing. Data were recorded on different agronomic characters, 1000-grain weight, physiological parameters and visual seed characteristics. At maturity, the middle four rows of 5 meter long were harvested to estimate grain yield and expressed as kg ha^-1. All recommended intercultural operation was done for better performance of crop. One meter long row was harvested from each plot and threshed by hand for chemical analysis.

Source of Information: Annual Research Report, Wheat Research Centre, BARI--2013-14

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Significant variations were present among the genotypes for almost all of the traits studied except canopy temperature at vegetative stages (CT veg 1 & CT veg 2). Only 13 of the genotypes had shorter vegetative growth period than the check variety BARI Gom 26 whereas 11 of them had shorter life cycle (DTM). Canopy temperature at grain filling stage varied significantly (18.2 – 20.5⁰C) and most of the entries maintained cooler temperature at this stage than the check variety (20.1⁰C) which was a good indication of tolerance to high temperature stress. Thirty eight of the genotypes showed higher SPAD value (37.8 – 51.6) at flowering stage whereas 33 of them showed higher SPAD value at 7 days after anthesis (38.4 – 61.5). This indicated better ability of the genotypes for photosynthesis. Visual waxiness is another physiological trait related to heat and drought tolerance mechanism. Visual waxiness varied significantly among the entries and almost all of the genotypes showed higher waxiness (2.1 – 7.7) than the check variety (2). Normalized Difference Vegetation Index (NDVI) at early vegetative stage indicated that except E 46 (54.0) and E 27 (58.2) all other genotypes had better ground coverage (63.0 – 75.1) at this stage than the local check (60.9). NDVI at pick vegetative growth stage indicates the amount of biomass which showed significant variation among the genotypes (63.5 – 76.8). High biomass production was a good indicator for stress recovery and good yield potential in late sown heat stress condition. Most of the genotypes showed higher NDVI value for biomass than the check variety confirms higher biomass production by them. NDVI reading (1-6) at grain filling period is also the indication of stay green capacity of a genotypes. Most of the genotypes had good stay green character as observed by the NDVI values at this stage. Most of the genotypes were shorter (79 – 94 cm) or equally tall to the check variety (94 cm) but many of them were taller (95 – 102 cm) than the check. .Although most of the genotypes had longer grain filling period than the check variety, only 2 of them could perform higher yield due to lower rate of grain filling. There was significant variation for grain yield m^-2. E 6 and E 17 was out yielded Check variety (BARI Gom 26) while some other had good potential yield similar to check. None of the entries had TGW equivalent to or more than Check variety (51.8g) but many of them had good bold seed. Only 4 of the genotypes (E 28, E 37, E 25 and E 9) had higher number of spikes per square meter but many of them had similar number of spikes and good grain yield. Except E 18, E 45 and E 46 all other genotypes had higher number of spikelet per spike. Fifteen genotypes also had higher number of grains per spike (56.9 – 66.6) than the local check BARI Gom 26 (56). Entry 4 was not selected due to admixture in the field.

Knowledge Management: Report/Proceedings