Wild carrot diversity for new sources of abiotic stress tolerance to strengthen vegetable breeding in Bangladesh and Pakistan

Abstract

Crop wild relatives (CWRs) of carrot (Daucus. carota L.) including 64 germplasm accessions of D. carota L. subsp. carota, D. carota L. subsp. capillifolius (Gilli) Arbizu, and D. carota L. subsp. gummifer (Syme) Hook. f., as well as two accessions of another 18‐chromosome species, D. syrticus Murb., were grown in field trials to flowering under conditions of heat, drought, and salinity stress in Bangladesh and Pakistan. Plant growth before floral initiation was evaluated and plants were allowed to progress to flowering to evaluate seed production. A wide range of response was observed among entries ranging from no germination or plant death early in development to vigorous growth. Carrot grown under optimal conditions in the greenhouse served as a useful control to estimate tolerance indices in the field. New sources of heat and drought tolerance in subsp. carota and subsp. capillifolius accessions were identified with similar performance in both countries. Ecogeographic analysis demonstrated that environmental parameters at the collection location of germplasm were associated with heat and drought tolerance observed in field trials. Plants evaluated for tolerance were allowed to flower and seed was produced on selected plants with abiotic stress tolerance to develop populations or breeding pools and to initiate the development of carrot better adapted to climatic abiotic stress.

A prioritised inventory of crop wild relatives and wild harvested plants of Tunisia

“…Tunisia lies in the centre of origin of carrot (Daucus carota) and hosts a rich diversity of wild and rare related taxa (Mezghani et al 2019;Simon et al 2020) 2019). However, it must be observed that Eleven CWR taxa (high priority) belonging to Aegilops L. (GP2) and Triticum L. (GP1b), and 6 tertiary gene pool taxa (medium priority) are relatives of wheat (Triticum spp.)…”

Wild Species of Daucus L. In Selection and Preservation of Ex Situ in the Conditions of the Moscow Region

“…Культурная морковь, вероятно, была одомашнена в Центральной Азии примерно 1100 лет назад [19]. Во многих регионах мира, где выращивают морковь, популяции дикой моркови можно найти в непосредственной близости от полей культивируемой моркови [20,21].…”

Adapting Agriculture to Climate Change: A Synopsis of Coordinated National Crop Wild Relative Seed Collecting Programs across Five Continents

“…Although CWR have been relatively neglected for decades [ 15 ], their potential was highlighted by Vavilov, and their use in breeding has been increasing since the 1980s [ 16 ]. The use of CWR is widespread and well-established for crops such as barley [ 17 ], potato [ 18 ], wheat [ 19 , 20 , 21 , 22 ] and rice [ 23 , 24 , 25 ] and developing for others such as alfalfa [ 26 ], carrot [ 27 ], chickpea [ 28 ], eggplant [ 29 , 30 ], finger millet [ 31 ], grass pea [ 32 ] and sorghum [ 33 , 34 ]. The starting point for use is viable hybridization between the crop and a wild relative.…”