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Accueil du site → Master → Etats Unis → 1978 → Caryopsis and shoot development of barley (Hordeum vulgare L.) grown under three irrigation regimes

University of Arizona (1978)

Caryopsis and shoot development of barley (Hordeum vulgare L.) grown under three irrigation regimes

Rogers, Michael Lawrence

Titre : Caryopsis and shoot development of barley (Hordeum vulgare L.) grown under three irrigation regimes

Auteur : Rogers, Michael Lawrence

Université de soutenance : University of Arizona

Grade : Master of Science (MS) 1978

Résumé
A morpho-physiological study involving three commercial and five experimental entries of barley (Hordeum vulgare h.) was conducted 2 in the field under normal irrigation, 662 kg/m , and water-stress levels 2 2 of 448 kg/m and 281 kg/m . For all entries other than Arivat, the 2 281 kg/m treatment effectively increased the rate of kernel maturation. A significant sampling date x irrigation interaction occurred in every entry, excluding Arivat and experimental ’B,’ for the variable of kernel number per head. The normal irrigation treatment produced the greatest yield in all cases. The grain yield decrease, however, ranged from 16% 2 in Arivat to 65% in experimental ’E.’ The 281 kg/m regime provided the 2most efficient use of water by all entries. Arivat under the 281 kg/m treat&ent rendered the most efficient water use value. Reduction in plant height was most strongly influenced by the decrease in length of the peduncle and its preceding internode. Kernel quality components tended to increase during grain filling and maturation when available soil moisture was restricted. The combined results suggest that the ability of a genotype to yield well under such conditions does not necessarily lie in its degree of tolerance to water stress, but in its inherent yield potential derived from a diverse genetic background.

Mots clés : Barley. ; Barley — Irrigation.

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Page publiée le 20 mai 2016, mise à jour le 18 décembre 2017