TY - JOUR
T1 - Viability of Deficit Irrigation Pre-Exposure in Adapting Robusta Coffee to Drought Stress
AU - Sseremba, Godfrey
AU - Tongoona, Pangirayi Bernard
AU - Musoli, Pascal
AU - Eleblu, John Saviour Yaw
AU - Melomey, Leander Dede
AU - Bitalo, Daphne Nyachaki
AU - Atwijukire, Evans
AU - Mulindwa, Joseph
AU - Aryatwijuka, Naome
AU - Muhumuza, Edgar
AU - Kobusinge, Judith
AU - Magambo, Betty
AU - Kagezi, Godfrey Hubby
AU - Danquah, Eric Yirenkyi
AU - Kizito, Elizabeth Balyejusa
AU - Kyalo, Gerald
AU - Iyamulemye, Emmanuel
AU - Arinaitwe, Geofrey
N1 - Publisher Copyright:
© 2023 by the authors.
PY - 2023/3
Y1 - 2023/3
N2 - Coffea canephora has high but inadequately exploited genetic diversity. This diversity, if well exploited, can sustain coffee productivity amidst climate change effects. Drought and heat stress are major global threats to coffee productivity, quality, and tradable volumes. It is not well understood if there is a selectable variation for drought stress tolerance in Robusta coffee half-sibs as a result of watering deficit pre-exposure at the germination stage. Half-sib seeds from selected commercial clones (KR5, KR6, KR7) and a pipeline clone X1 were primed with deficit watering at two growth stages followed by recovery and later evaluated for tolerance to watering deficit stress in three different temperature environments by estimation of plant growth and wilt parameters. Overall, the KR7 family performed the best in terms of the number of individuals excelling for tolerance to deficit watering. In order of decreasing tolerance, the 10 most promising individuals for drought and heat tolerance were identified as: 14.KR7.2, 25.X1.1, 35.KR5.5, 36.KR5.6, 41.KR7.5, 46.KR6.4, 47.KR6.5, 291.X1.3, 318.X1.3, and 15.KR7.3. This is the first prospect into the potential of C. canephora half-sibs’ diversity as an unbound source of genetic variation for abiotic stress tolerance breeding.
AB - Coffea canephora has high but inadequately exploited genetic diversity. This diversity, if well exploited, can sustain coffee productivity amidst climate change effects. Drought and heat stress are major global threats to coffee productivity, quality, and tradable volumes. It is not well understood if there is a selectable variation for drought stress tolerance in Robusta coffee half-sibs as a result of watering deficit pre-exposure at the germination stage. Half-sib seeds from selected commercial clones (KR5, KR6, KR7) and a pipeline clone X1 were primed with deficit watering at two growth stages followed by recovery and later evaluated for tolerance to watering deficit stress in three different temperature environments by estimation of plant growth and wilt parameters. Overall, the KR7 family performed the best in terms of the number of individuals excelling for tolerance to deficit watering. In order of decreasing tolerance, the 10 most promising individuals for drought and heat tolerance were identified as: 14.KR7.2, 25.X1.1, 35.KR5.5, 36.KR5.6, 41.KR7.5, 46.KR6.4, 47.KR6.5, 291.X1.3, 318.X1.3, and 15.KR7.3. This is the first prospect into the potential of C. canephora half-sibs’ diversity as an unbound source of genetic variation for abiotic stress tolerance breeding.
KW - Coffea canephora
KW - climate change adaptation
KW - drought stress recovery
KW - drought tolerance
KW - heat stress adaptation
KW - priming by deficit watering
UR - http://www.scopus.com/inward/record.url?scp=85152468209&partnerID=8YFLogxK
U2 - 10.3390/agronomy13030674
DO - 10.3390/agronomy13030674
M3 - Article
AN - SCOPUS:85152468209
SN - 2073-4395
VL - 13
JO - Agronomy
JF - Agronomy
IS - 3
M1 - 674
ER -