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    EVALUATING SHORT STATURE AND HIGH YIELDING MAIZE HYBRIDS IN MULTIPLE ENVIRONMENTS USING GGE BIPLOT AND AMMI MODELS
    (2020) Ahmed, Asgar; Hossain, Akbar; AMIRUZZAMAN, Muhammad; ALAM, Md. Ashraful; FAROOQ, Muhammad; EL SABAGH, Ayman; Kızılgeçi, Ferhat
    In Bangladesh, maize stands second place after rice; since it faces diverse natural calamities during its highest growing season (rabi/winter), particularly strong storm during the reproductive stage. Sometimes in some regions, this crop is completely damaged by natural disasters. Considering the burning issue, thirteen hybrids, including 10 previously selected short stature hybrids were evaluated against three local and standard checks: ‘BHM-9’, ‘981’ and ‘Sunshine’ in two consecutive years in seven locations of Bangladesh. Combined analysis over locations and seasons instigated that genotypes ‘Sunshine’, ‘981’ and ‘G10’ were the top-high yielders, while genotypes ‘G1’, ‘G2’, ‘BHM-9’ and ‘Sunshine’ were found the most stable. On the other hand, five genotypes such as ‘G3’, ‘G4’, ‘G6’, ‘G8’ and ‘G9’ had the below-average mean yield and the genotypes ‘G6’ and ‘G9’ were the most unstable. Among the seven environments, Jamalpur, Joydebpur and Dinajpur were most discriminating and Ishwardi was the least discriminating; whereas Joydebpur was more representative and Borishal was the least representative of other test environments. In the case of plant and ear height, most of the genotypes showed a lower value than all the checks, which was desirable. But among the top three high yielders, local cross-genotype, the ‘G10’ had the lowest and more stable value for both plant height and ear height. Therefore, considering the plant and ear height, grain yield, and yield stability, the genotype ‘G10’ has been recommended for release as commercial variety and has been released as new maize variety in Bangladesh with the local name of ‘BARI Hybrid Maize-16’ (BHM-16).
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    PHENOLOGY, GROWTH AND YIELD ARE STRONGLY INFLUENCED BY HEAT STRESS IN LATE SOWN MUSTARD (BRASSICA SPP.) VARIETIES
    (2020) Bazzaz, Md., Mahfuz; Hossain, Akbar; FAROOQ, Muhammad; Alharby, Hesham; Bamagoos, Atif; Nuruzzaman, Md; Khanum, Mahbuba; Hossain, Md. Monwar; Kızılgeçi, Ferhat; Öztürk, Ferhat; Çığ, Fatih; EL SABAGH, Ayman
    In rice-based cropping system of northern Bangladesh, mustard planting is delayed due to late harvest of monsoon rice (Transplanted Aman rice; T. Aman rice). The late sown mustard is often exposed to high-temperature stress during the reproductive stage, which causes a significant decrease in seed yield. Most of the farmers plant a low yielding local mustard variety ‘Tori-7’, which is sensitive to high-temperature stress. The Oil Seeds Research Centre of Bangladesh Agricultural Research Institute has recently released short duration and high-yielding mustard varieties for the rice-based cropping system of northern Bangladesh to tackle this issue. However, the performance of these varieties in the target cropping system under late sown conditions (together with exposure to heat stress) has not been evaluated yet. Therefore, this two year field experiment was conducted to assess the performance of newly released mustard varieties ‘BARI Sarisha-14’ and ‘BARI Sarisha-15’ in comparison with the local check variety ‘Tori-7’ sown at five planting dates (viz. October 21, November 1, November 10, November 20, and November 30). The delay in sowing shortened time (days) to flowering and maturity, regardless of the variety. Similarly, plant height, branches/plant and total dry matter accumulation of the tested varieties were also reduced upon delay in planting. The greatest seed yield was observed in varieties ‘BARI Sarisha-15’ and ‘BARI Sarisha-14’ when sown on October 21. These two varieties produced fair seed yield when sown at November 20. However, the local variety ‘Tori7’ yielded the least across all the planting dates. Therefore, the varieties ‘BARI Sarisha-14’ and ‘BARI Sarisha-15’ may be planted in the rice-based cropping system of northern Bangladesh after harvest of T. Aman rice to get maximum seed yield