Harnessing Chickpea Value Chain for Nutrition Security and Commercialization of Smallholder Agriculture in Africa

This proceedings on "Harnessing Chickpea Value Chain for Nutrition Security and Commercialization of Stallholder Agriculture in Africa’ is the outcome of the First International Chickpea Workshop held in Debre Zeit, Ethiopia – the location which represents the major chickpea growing areas in the country as well as Center of Excellence for the national chickpea research. As it is the first of its kind in that scope, the First International Chickpea Workshop created a vibrant interaction among our global partners and individuals from the chickpea communities. In looking forward, it has been strongly believed that the workshop not only documents what has been achieved by the different interaction levels but also demonstrates that the NARS could play significant role in promoting science and knowledge to resolve agricultural bottlenecks of their own. Accounting for ~2.5% of world and more than 55% of Africa's chickpea production, Ethiopia stands to the top 10 global chickpea producing countries while it is the 1st producer in Africa. Research advances in breeding and crop management practices over the four decades resulted in the development and release of proven technologies that brought a dramatic productivity increase from less than a tone to close to two tons in just a decade and half, comparable to many high input cereals, which has significantly improved the livelihoods of smallholder farmers. In addition, the crop has emerged as one of the major agricultural export commodities next to coffee, sesame and beans. As a result, Ethiopian chickpea has now been shifted from a simple precursor crop to a principal component of the cropping system that significantly contributed in leveraging poverty reduction..

Impact of grasspea genotypes and sowing dates on seed &#946-ODAP concentration and agronomic traits.

Grasspea (Lathyrus sativus) is an important food legume crop in Ethiopia. However, its nutritional value ishindered by β-ODAP that causes lathyrism in humans. The extent of toxicity is influenced by genetic andagronomic factors.We conducted an experiment to determine the effect of varieties and sowing dates on the β-ODAP content of the seeds and other yield components. Two varieties, Bio-520 and landrace, were planted onJuly 24, August 7 and 21, and September 4 in the 2001-02 and 2002-03 cropping seasons. Grasspea variety andseason, significantly influenced β-ODAP content of the seeds.The highly significant variety x season interactionssuggests that varieties behave differently in different seasons for their β-ODAP content. The main effects andinteractions were highly significant for days-to-flowering and plant height. Although β-ODAP content of thevarieties varied with season, the improved genotype always contained less β-ODAP concentration.Thus, whilethe development of low-toxin grasspea lines is the primary goal, modifying agronomic practices is also importantto mitigate lathyrism.Key Words: Ethiopia, Lathyrus sativus, Lathyrism, neurotoxi

Response of chickpea to varying moisture stress conditions in Ethiopia

Chickpea (Cicer arietinum L.) is an economically important crop grown by nearly one million Ethiopian smallholder farmers. The crop is often considered as “stress-loving,” but moisture stress at flowering and grain filling stages could be detrimental. Yield of chickpea is commonly affected by terminal drought stress in the rainfed production system in Ethiopia. The lack of proper field-screening methods has hindered the development of drought-tolerant varieties. This study demonstrates a simple and practical field-level screening method for drought tolerance traits in the conventional breeding programs. A field experiment was conducted using 28 elite chickpea cultivars during the 2018–2019 main cropping season to study their response to moisture regimes of varying drought intensities. We used yield and its components as proxy parameters of screening to select tolerant cultivars. The study revealed significant variation among the cultivars in their response to different moisture regimes. The kabuli cultivars were found more sensitive compared with the desi types. Yield penalty exceeded 70% under severe drought. Conversely, cultivars tested under mild and severe stress drought showed average yield gain of 22 and 48%, respectively, relative to the irrigated treatment. Overall, over 50% yield gain can be obtained in drought-affected rainfed production areas in Ethiopia using supplemental irrigation during pod setting to grain filling stages. For post-rainy-season crops relying on residual soil moisture, such as chickpea, breeding for shorter duration and resilient cultivars are reliable management approaches to minimize drought-caused yield losses

IMPACT OF GRASSPEA GENOTYPES AND SOWING DATES ON SEED \u3b2-ODAP CONCENTRATION AND AGRONOMIC TRAITS

Grasspea ( Lathyrus sativus ) is an important food legume crop in Ethiopia. However, its nutritional value is hindered by \u3b2-ODAP that causes lathyrism in humans. The extent of toxicity is influenced by genetic and agronomic factors.We conducted an experiment to determine the effect of varieties and sowing dates on the \u3b2- ODAP content of the seeds and other yield components.Two varieties, Bio-520 and landrace, were planted on July 24, August 7 and 21, and September 4 in the 2001-02 and 2002-03 cropping seasons. Grasspea variety and season, significantly influenced \u3b2-ODAP content of the seeds.The highly significant variety x season interactions suggests that varieties behave differently in different seasons for their \u3b2-ODAP content. The main effects and interactions were highly significant for days-to-flowering and plant height. Although \u3b2-ODAP content of the varieties varied with season, the improved genotype always contained less \u3b2-ODAP concentration.Thus, while the development of low-toxin grasspea lines is the primary goal, modifying agronomic practices is also important to mitigate lathyrism.Le pois carr\ue9 ( Lathyrus sativus ) est une importante l\ue9gumineuse pour l\u2019alimentation humaine en Ethiopie. Cependant, sa valeur nutritionnelle est handicap\ue9e par le \u3b2-ODAP qui cause le lathyrisme chez les humains. Le degr\ue9 de toxicit\ue9 est influenc\ue9 par des facteurs g\ue9n\ue9tiques et agronomiques. Un essai \ue9tait conduit pour d\ue9terminer l\u2019effet de vari\ue9t\ue9s et de dates de plantation sur la teneur en \u3b2-ODAP dans les graines et autres composantes du rendement. Deux vari\ue9t\ue9s notamment la Bio-520 et le landrace, \ue9taient plant\ue9es pendant les saisons culturales 2001-02 et 2002-03 en Juillet 24, le 7 et le 21 Ao\ufbt ainsi que le 4 Septembre. Les vari\ue9t\ue9s du pois carr\ue9 et la saison ont significativement influenc\ue9 la teneur du \u3b2-ODAP dans les graines. Les interactions hautement significatives entre vari\ue9t\ue9 x saison sugg\ue8rent que les vari\ue9t\ue9s se comportent diff\ue9remment pendant des saisons diff\ue9rentes en termes de la teneur en \u3b2-ODAP. Les effets principaux et interactions \ue9taient hautement significatifs \ue0 la floraison et en fonction de la hauteur des plants. Bien que la teneur en \u3b2-ODAP variait avec la saison, les g\ue9notypes am\ue9lior\ue9s contenaient une basse concentration en \u3b2-ODAP. Ainsi, pendant que le d\ue9veloppement du pois carr\ue9 est un objectif prioritaire, la modification des pratiques agronomiques est aussi importante pour la mitigation du lathyrisme

Stability Analysis in Chickpea Genotype Sets as Tool for Breeding Germplasm Structuring Strategy and Adaptability Scoping

Chickpea research program has come across realizing the importance of restructuring the working germplasm pool in Ethiopia where we have 39 divergent agroecological zones (AEZ). Though chickpea is not suit to all, it adapts in more than 30% of the agroecologies having different scale of responses. Hence, as show case we have tried to scan the agroecologies discrimination power based on crop using three sets of bred-crop responses. Evidently enough, germplasms in all the sets have revealed differential responses for economical yield and associated traits, from the three set of 57 entries put under 47 environments. The AMMI stability value and stability index have been able to discriminate genotypes with designated position; and supposed the breeding program would signify values by attempting both environment and genetics still as key considerable factors

Correlation and Path Coefficient Analysis for Various Quantitative Traits in Desi Chickpea Genotypes under Rainfed Conditions in Ethiopia

Chickpea is rich in protein and micronutrients and plays a significant role in human diet especially as accompaniment to staples, but grain yields in Ethiopia are still below the crop potential. Field experiments were conducted during 2007/8-2009/10 to determine relationships among yield and some yield components using correlation and path coefficient analysis in desi chickpea grown under rainfed conditions. Correlation studies revealed that seed yield was significantly and positively correlated with days to flowering, days to maturity, number of pods per plant, number of seeds per pod, stand count at harvest, plant height and biomass. The path coefficient analysis based on seed yield, as a dependent variable, revealed that biomass had the greatest direct effect on seed yield (0.0146) and followed by stand count at harvest and plant height. Both correlation and path analyses indicated that biomass, stand count at harvest and plant height were the major direct contributors to seed yield. Thus, the present study suggests that more biomass production, stand count at harvest and plant height are major yield factors in selecting high yielding desi chickpea cultivars

Genotype by environment interaction on yield stability of desi type chickpea (Cicer arietinum L.) at major chickpea producing areas of Ethiopia

This study was conducted to determine the interaction between chickpea genotypes with the environment (GxE) on the yield stability and adaptability of desi type chickpea genotypes (Cicer arietinum L.). Seventeen chickpea genotypes were evaluated for two cropping years (2012/2013 – 2013/2014) at four locations i.e., eight environments (locations x years combination). Chickpea grain yield was significantly (p<0.01) affected by genotypes, the environments and GxE interaction, indicating that the varieties and the test environments were diverse. GxE was further partitioned by principal component axes. The first two principal components cumulatively explained 53.1% of the total variation, of which 32.7% and 20.4% were contributed by IPCA1 and IPCA2, respectively. This implies that the interaction of 17 chickpea genotypes with eight environments was predicted by the first two principal components. AMMI1 biplot analysis showed five adaptive categories of genotypes based on similarities in their performance across environments. The AMMI2 biplot generated using genotypes and environmental scores for the first two IPCAs revealed positioning of the five genotype groups (GC) into four sectors of the biplot. Among them, two genotypes in GC 5 (G5 and G11) exhibited high yields across environments, low IPCA1 scores, low AMMI stability value (ASV) and yield stability index (YSI). G5 was released as a new variety, ‘Dimtu’ and registered in the Official Varieties Catalogue of Ethiopia, 2016

Ecology and genomics of an important crop wild relative as a prelude to agricultural innovation

Domesticated species are impacted in unintended ways during domestication and breeding. Changes in the nature and intensity of selection impart genetic drift, reduce diversity, and increase the frequency of deleterious alleles. Such outcomes constrain our ability to expand the cultivation of crops into environments that differ from those under which domestication occurred. We address this need in chickpea, an important pulse legume, by harnessing the diversity of wild crop relatives. We document an extreme domestication-related genetic bottleneck and decipher the genetic history of wild populations. We provide evidence of ancestral adaptations for seed coat color crypsis, estimate the impact of environment on genetic structure and trait values, and demonstrate variation between wild and cultivated accessions for agronomic properties. A resource of genotyped, association mapping progeny functionally links the wild and cultivated gene pools and is an essential resource chickpea for improvement, while our methods inform collection of other wild crop progenitor species

A Decade of Research Progress in Chickpea and Lentil Breeding and Genetics

This paper summarizes achievements of chickpea and lentil breeding during the last decade /2005-2015/ in Ethiopia. Gentic yield gains from decadal breeding efforts were 80 kg/ha/year for chickpea and 52 kg/ha/yr for lentil. The germplasm enhancment and subsequent variety evaluation verification programs during the decade resulted in releases of 17 chickpea and 2 lentil varieties. These advanced varieties, when applied in production system with proper crop managment and protection practices, almost doubled productivity per unit area at farm level