Due to the low biological value of proteins of common maize, it was reinitiated breeding for high protein quality maize (HQPM) using three genetic systems, namely: opaque-2 gene, endosperm modifier genes and enhancer genes, which are increasing lysine and tryptophan content in opaque-2 background In order to alleviate effect of abiotic and biotic stress factors, the genotypes with tolerance to those factors were included. Genetic resources originating from North, Central and South America, then West, Central and Southern Africa and gene bank of Maize Research Institute “Zemun Polje” were used. Combining breeding approaches in selection of genetic resources, field plot techniques and laboratory analysis, it was created large number of early QPM varieties, inbred lines and hybrids with modified endosperm and high yield potential under poor and good growing conditions. Created lines exhibited high combining ability in conventional and non-conventional hybrids. Yield trials showed that QPM hybrids are competing with commercial hybrids of common maize.

Maize is the principal crop and major staple food in the most African and South American countries. The main problem in human nutrition in developing countries, and in livestock feed in developed countries, is insufficient production and poor quality of cereal proteins. In the case of maize, due to the very low content of essential amino acids lysine and tryptophan in grain endosperm, biological value is very low, which is main limiting factor of common maize in human nutrition and feeding of monogastric animals. Quality protein maize (QPM) can help in solving of this problem. Maize production also faces serious constraints caused by agro-ecological conditions and poor socio-economic situation. To alleviate the effect of the constraints, selected genotypes with more desirable traits and appropriate field-plot techniques to create multiple-stress conditions, were used. It was found that, in downy mildew nursery distance up to 35 m from spreader plot is providing sufficient down load of spores for plant infection, provided that the testing breeding materials are planted towards to down-stream direction of the dominant wind. Using these breeding approaches large number of early, white and flint synthetics, composites and inbred lines were created with resistance or tolerance to downy mildew (DMR), maize streak virus (SR) and drought (DT). Created genotypes exhibited very good kernel modification and yield potential under low and normal inputs. In the case of synthetics and composites, besides tolerance to multiple stress factors, they were competing in yield with local QPM and normal maize checks. In the case of created inbred lines high combining ability was exhibited both in non-conventional and conventional maize hybrids. Trial data revealed that in the most cases the best entries were over-yielding the best checks.

The incrementation of lysine, tryptophan and maize protein nutritional value in locals where maize is staple food could contribute significantly to improving the population nutritional status. The objective of this study was to estimate variance and average components related to the maize protein quality based on tryptophan and grain yield analysis, and to select from the early generations progenies which best complement with the tester for both characters. The laboratory analyses were carried out by using colorimetric reactions and the statistical analyses were based on mixed model. The experiment was set out in partially balanced square lattice with 144 treatments, two replications and 12 blocks. The estimations, associated with the assessed treatment performances made it possible to infer that both populations are promising for recurrent selection and suggested good experimental precision. The selective accuracy demonstrated the possibility of obtaining gains by selecting in both characters. For tryptophan content, the specific combining ability presented small magnitude value due the qualitative inheritance and, the additive effects might have been more important. The shrinkage effect in grain yield was more noticeable than the tryptophan content. Over 25% of the progenies contributed positively to the tryptophan content and only 3.65% to grain yield.

Groundnuts (Arachis Hypogaea) in Tanzania

In Tanzania, where groundnut is one of the main annual crops, the production cost of groundnut is cheaper than of other annual crops like rice (Akpo, Muricho, et al., 2020; Bakari et al., 2021). The total production cost of groundnut ranges from 500,000 TZS/ha to 1,000,000 TZS/ha compared to rice, which ranges from 2,500,000 TZS/ha to 3,250,000 TZS/ha (Ndabila, 2018). Groundnut can be produced in all areas with an altitude below 1500m and having alluvial soils (Daudi et al., 2012). In Tanzania, groundnut is mainly produced in Dodoma, Tabora, Geita, Shinyanga, Songwe Mbeya, Katavi, Singida, Rukwa and Manyara regions (URT, 2021). Likewise, groundnut is largely produced in Kigoma, Mwanza, Mtwara, Simiyu and Kagera. Most of these regions are either semi-arid or arid and mostly challenged by drought, food insecurity and poverty.

Currently, the country needs to cope with increasing drought due to climate change, market shift, and other biotic and abiotic stresses (Zurich, 2014). In addressing these challenges for improving people’s livelihood, Tanzania Agricultural Research Institute (TARI) in collaboration with other development partners released 17 improved groundnut varieties (Mwalongo et al., 2020). Six improved groundnut varieties were release between 1960s and 1990s (Daudi et al., 2012). The outcomes, however, were below expectations attaining maximum average productivity of 444 kg/ha during the period. Thereafter, 11 more improved varieties were released, and productivity increased to an average of 745 kg/ha. This is still less than the average productivity of Africa, which is 800kg/ha (FAO, 2020). Even though the new varieties were available, it was reported that about 81% of the groundnut producers still use old varieties, which are less resistant to drought and diseases, have low productivity between (0.5t/ha to 1t/ha) against the potential yield of between (1-2t/ha) and low market value (Mwakimata, 2017).

Limited use of improved varieties by farmers was reported as one of the major bottlenecks to realize high yield in the country (Daudi et al. 2018; Akpo et al. 2020). Use of improved varieties will make ever lasting effects on peoples’ health, financial power and human resource capacity of the country. Studies illustrate that the groundnut market is expanding in Tanzania due to a rapid population growth rate of 3.1 per year, multiple uses of groundnut and exports of about 20,000 tons per year (URT, 2020). All these factors combined raised an alarm of increasing awareness and use of improved groundnut varieties.

This variety catalogue underscores the important characteristics of all the released groundnut varieties since 1960s to date, an effort to enhance stakeholders’ awareness and groundnut utilization along the value chain in Tanzania.

Groundnuts (Arachis Hypogaea) Varieties Released in Tanzania

Tanzania Agricultural Research Institute (TARI) in collaboration with Development Partners released 17 improved groundnut varieties (Mwalongo et al., 2020). Six improved groundnut varieties were release between 1960s and 1990s (Daudi et al., 2012). The description of the varieties have been provided in the document.

COMMON BEANS (Phaseolus Vulgaris) RESEARCH IN TANZANIA

Common bean (Phaseolus vulgaris L.) plays a paramount role in the livelihoods of smallholder farmers in Tanzania; as a food security crop and source of income.  Both the cultivated area and bean production level has increased over the years since 1995. The upward trend can be attributable to research efforts by National Agricultural Research System (NARS) in collaboration with CIAT/PABRA which have resulted in identification and development of several improved bean varieties tolerant to environmental stresses. This has increased bean productivity from 0.5 MT/Ha in 1974 to 1.4 t/ha in 2021 (FAOSTAT, 2022).

However, bean production in the country is limited by several biotic and non-biotic constraints. Major constraints include, genetically low yielding varieties, diseases, insect pests and poor soil fertility, especially low soil nitrogen and phosphorus. In view of both the diversity of the constraints and the fact that common bean is largely a “resource -poor farmer’s crop”; development and dissemination of improved bean genotypes is the most viable option for promoting bean productivity in Tanzania.

Frequent droughts in most East and Central African countries have led to food shortages, malnutrition, social instability and reliance on food aid (IGAD, 2007). This scenario has underscored the need for improved crop varieties and associated technologies which assure farmers of a reasonable harvest in rapidly changing production environments.

Due to high demand for beans, partly as a result of rapid population growth, its demand has outstripped supply, with some countries in the region becoming net bean importers. The overall objective for the bean research Programme is to contribute to the attainment of sustainable food self-sufficient at household and national level, increase income generation, employment growth and enhanced earnings through the development and dissemination of appropriate and environmentally friendly technologies.

COMMON BEANS (Phaseolus Vulgaris) VARIETIES RELEASED IN TANZANIA

 The bean research program under the Tanzania Agricultural Research Institute (TARI) has released high productive, multiple tolerant and nutrient dense common bean varieties. This catalogue gives a description of 41 released bean varieties among them six (6) are climbing types and 35 bush types. For each variety, the catalogue provides identification, morphological and agronomic characteristics, and recommended production areas.

This study aimed to investigate the effect of age at weaning of calves on non‐ esterified fatty acids (NEFA) and reproductive parameters of beef cows. Animals (n = 65) were randomly assigned to three treatments after calving: hyper‐early weaning (W30) at 32 ± 0.89 days, early weaning (W75) at 77 ± 0.95 days, and conventional weaning (W180) at 183 ± 0.82 days. Body weight (BW) and body condition score (BCS) were evaluated at parturition (AP) and at 30, 45, 64, 81, 100 and 115 days postpartum (dPP). Blood samples were collected to analyze NEFA levels and progesterone (P4) at 30, 45, 64 and 81 dPP. Higher BW and BCS were observed from 64 to 115 dPP in W30 cows than W180 ones (p < 0.05). Cows subjected to W30 condition had higher levels of NEFA at 30 dPP compared to 64 and 81 dPP (p < 0.05). We also observed that cows from W180 group showed decreased levels of NEFA at 30 dPP compared to 45 (p < 0.01) and 64 dPP (p < 0.05). The highest P4 level was observed at 64 dPP in W30 cows compared to W75 and W180 (p < 0.05). We also observed higher CR of W30 (86%) compared to W180 (47%) at 45 dPP (p < 0.05). The overall pregnancy rate (PR) was higher for W30 (95.5%) than W180 (73.9%). In addition, higher BW at calving and P4 levels at 30 dPP were positively correlated with the possibility of pregnancy (p < 0.05). Improvement in BW and BCS were observed in cows subjected to hyper‐early weaning management. However, levels of NEFA decreased as the postpartum period progressed. We concluded that cows who weaned calves hyper‐early have greater chances of increasing cyclicity and PRs.

The articles discusses the Malabo interventions in Malawi, especially focusing on the Nutrition component under the Sustainable Agriculture Production Programme.

Guide to Good Agriculture Practices in MalawiiFOREWORDThe government of Malawi recognizes the importance of using well researched and vetted Good Agricultural Practices (GAPs) in promoting sustainable agricultural production in the country to eliminate hunger and malnutrition. The Sustainable Agricultural Production Programme (SAPP), one of the initiatives that Government of Malawi (GoM) has putin place to address some of the problems that smallholder farmers face in their production activitiesis contributing to poverty reduction and improved food security among rural populations through achieving a viable and sustainable smallholder agricultural sector employing good agricultural practices (GAPs) in Malawi. The program is being implemented in 6 districts of Chitipa, Nkhotakota, Lilongwe, Balaka, Chiradzulu and Blantyre. The government of Malawi, through SAPP noted the shortfalls in the implementation of the GAPs and commissioned a synthesis of the research findings in Malawi and the region to inform on the GAPs which are ready to go and where best fit to advise the extension and technical person and their applicability. The exercise developed user friendly tools which can be used by the extension personnel in advising the most befitting GAPs in their areas of operations. TheMinistry of Agriculture,Water and Irrigation Developmentis committed to support all the stakeholders supporting agricultural production in the country to adoptthe application of the tools developed.

In this second edition of the Sustainable Agriculture Production Program (SAPP) Success Stories, we present achievements of smallholder farmers who have adopted various sustainable good agriculture practices with the support from SAPP.SAPP is being implemented in six districts in Malawi namely; Blantyre, Chiradzulu, Balaka, Lilongwe, Nkhotakota and Chitipa. In all those districts the programme has made significant differences in farmer’s lives in the areas of farmer adoption of sustainable good agriculture practices as well as in adaptive research and seed certification.In this second edition, you will get a picture of how farmer’s lives have changed since the introduction of the programme. Topical areas that have been covered include; seed multiplication of ground nuts, chicken production, agribusiness and nutrition, rocket stoves, conservation agriculture, other farming technologies and crop diversification.We hope our selection of success stories will inspire you to adopt and practice sustainable good agriculture practices which will in turn improve the country’s economic growth.

Nitrogen is a major plant nutrient which is most limiting in the soil due to soil losses of mineral nitrogen (N) form. To ensure availability of nitrogen in the soil, the study was conducted to screen four cowpea genotypes for Biological Nitrogen Fixation (BNF) and their contribution to maize yield in maize- cowpea rotation. The cowpea genotypes used were mutants LT11-3-3-12 (LT) and BB14-16-2-2 (BB) and their parental varieties Lutembwe (LTPRT) and Bubebe (BBPRT) respectively. Trials were established at two sites (Chisamba and Batoka) of different soil types. The Randomized Complete Block Design (RCBD) with three replications was used. Labelled 15N urea was applied at 20kgNha-1 on the four cowpea genotypes during 2015/16 growing season. Cowpea plant parts were dried and milled for 15N isotopic analysis. The data collected included Nitrogen content and atom % 15N excess in the fixing cowpea genotypes and non-nitrogen fixing pearl millet to determine total nitrogen derived from the atmosphere (TNdfa) and total nitrogen (TN) in plant parts which were further used to compute Biological Nitrogen Fixation (BNF). The results showed that BNF by cowpea genotypes at Chisamba was 63.9 kg ha-1 and was significantly (P<0.001) more than BNF of 6.6 kgha-1 at Batoka. The LT mutant fixed significantly (P<0.001) higher nitrogen of 86.1 kgha-1 and 16.5kg ha-1 at Chisamba and Batoka respectively than other genotypes. However, both BB and LT mutants significantly fixed more nitrogen than their parents and have demonstrated to increase maize grain yields up-to 12 tha-1 in the maize – cowpea rotation.