Heritability and genetic gain of digestible organic matter intake of barley straw genotypes by sheep, using repeatable in situ- and laboratory-based indicator traits

cg.contactunknown123@unknown12.comen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.countrySYen_US
cg.coverage.regionWestern Asiaen_US
cg.date.embargo-end-dateTimelessen_US
cg.identifier.doihttps://dx.doi.org/10.1017/S0021859622000399en_US
cg.isijournalISI Journalen_US
cg.issn0021-8596en_US
cg.issue5en_US
cg.journalJournal of Agricultural Scienceen_US
cg.subject.agrovocsyriaen_US
cg.subject.agrovocBarleyen_US
cg.volume160en_US
dc.contributorGrando, Stefaniaen_US
dc.contributorF Thomson, Euanen_US
dc.contributorHaylani, Mohammeden_US
dc.contributorCeccarelli, Salvatoreen_US
dc.creatorGoodchild, A.en_US
dc.date.accessioned2023-03-29T18:44:32Z
dc.date.available2023-03-29T18:44:32Z
dc.description.abstractThe voluntary digestible organic matter intake (DOMI) of mature barley crops (Hordeum spp.) for sheep depends largely on straw quality. Direct measurement of DOMI is laborious; consequently, the research reported here evaluated indicator traits for improving barley straw DOMI by crop breeding. It hypothesized that some indicator traits for straw quality are heritable, facilitate genetic gain in DOMI, and reveal straw properties that constrain genetic gain. In 4 years, 32 genotypes of barley were grown at ICARDA, northern Syria, with no fertilizer in one year and supplementary irrigation in another. Indicator traits for predicting DOMI included in situ straw dry matter losses (DML) at nine incubation times (0–120 h), four parameters of the DML curve, seven laboratory tests, grain yield and straw yield. Heritability (h2) was highest for traits associated with indigestible cell wall constituents, including potential DML (h2 = 0.61), DML at 48–120 h of incubation (h2 = 0.48–0.58), and acid detergent fibre (ADF) (h2 = 0.41). Heritability was lower for DOMI itself (h2 = 0.24), neutral detergent fibre (NDF) (h2 = 0.20), and total Kjeldahl nitrogen (h2 = 0.17), and was lowest for DML at 6–18 h (h2 = 0.08–0.09) and the in situ parameters Lag and relative loss rate of slowly degradable DM (h2 ≤ 0.03). Correlations between indicator traits and DOMI tended to increase with heritability. Grain and straw yields were not correlated with DOMI; of these, only grain yield was heritable. In conclusion, genetic gain in barley straw nutritive value can be achieved by crop breeding under diverse growing conditions, using indicator traits associated with indigestible cell wall constituents.en_US
dc.identifierhttps://mel.cgiar.org/dspace/limiteden_US
dc.identifier.citationA. Goodchild, Stefania Grando, Euan F Thomson, Mohammed Haylani, Salvatore Ceccarelli. (18/7/2022). Heritability and genetic gain of digestible organic matter intake of barley straw genotypes by sheep, using repeatable in situ- and laboratory-based indicator traits. Journal of Agricultural Science, 160 (5), pp. 380-390.en_US
dc.identifier.statusTimeless limited accessen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/68231
dc.languageenen_US
dc.publisherCambridge University Press (CUP)en_US
dc.sourceJournal of Agricultural Science;160,(2022) Pagination 380-390en_US
dc.subjectbarley straw qualityen_US
dc.subjecthordeum vulgareinen_US
dc.subjectin situ degradabilityen_US
dc.subjectsemiarid zoneen_US
dc.titleHeritability and genetic gain of digestible organic matter intake of barley straw genotypes by sheep, using repeatable in situ- and laboratory-based indicator traitsen_US
dc.typeJournal Articleen_US
dcterms.available2022-07-18en_US
dcterms.extent380-390en_US
mel.impact-factor2.603en_US

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