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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730 EISSN: 1021-9730
Vol. 5, No. 1, 1997, pp. 77-86
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Bioline Code: cs97010
Full paper language: English
Document type: Short Communication
Document available free of charge
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African Crop Science Journal, Vol. 5, No. 1, 1997, pp. 77-86
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Amuyunzu, P.A.; Chweya, J.A.; Rosengartner, Y. & Mendlinger, S.
Résumé
Des experiences sur la croissance de "cultivars" de treize melons (Cucumis
melo L.) ont ete menees a l'institut de recherces appliquees de Beer Sheva
(Israel) entre novembre 1992 et Avril 1993. Ces experiences ont etudie
l'incidence de differents regimes de temperature sur la croissance des
cultivars, et cherche a identifier des criteres de selection rapides et
fiables pour l'aquisition de la resistance au froid. Les cultigens ont
pousse dans des serres a des regimes de temperatures differents;
respectivement 1) 13 a 34 C et 2) 8 a 33 C. Ces cultivars ont ete examines
en fonction de taux de croisssance vegetative (longueur de la branche
centrale, nombre de noeuds, espace entre les noeuds et teneur en
chlorophylle). La variation parmi les cultivars entre differents regimes
et dans les memes regimes de temperature s'est averee significative pour la
plupart des plants. Les six meilleurs cultivars resistants a une
temperature suboptimale sont Cinco Midget, BsFDHK, Tal Dvash, H17 et H19.
Ces cultivars se sont montres plus performants mais pas necessairement a la
meme temperature dans les bas regimes, que les autres plants si l'on
distingue la sensation au froid et les lignes de tolerance au froid. Des
lors, cela pourrait constituer des criteres de selection rapides et fiables
pour acquerir la tolerance au froid.
Mots Clés
Cucumis melo, tolerance au froid, cultivars, temperature froide suboptimale, criteres de selection
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en |
Effect of different temperature regimes on vegetative growth of melon plants
Amuyunzu, P.A.; Chweya, J.A.; Rosengartner, Y. & Mendlinger, S.
Abstract
Experiments were conducted at the Institutes for Applied Research in
Beer-Sheva, Israel between November 1992 and April 1993 to study the
effects of different temperature regimes on vegetative growth of thirteen
melon (Cucumis melo L.) cultigens and to identify rapid and reliable
selection criteria for breeding for cold resistance. The cultigens were
grown in greenhouses at two temperature regimes: high and low with mean
minimum and maximum temperatures of 13 and 34 C, and 8 and 33 C,
respectively. The cultigens were examined for the rate and amount of
vegetative growth which included lengths of mainstems, number of nodes,
internode lengths and leaf chlorophyll content. Variation among the
cultigens both between and within temperature regimes was significant for
most of the traits. The best six cultigens for tolerance to suboptimal
growing temperatures were Cinco, Midget, BsFDHK, Tal Dvash, H17 and H19.
These cultigens were found to perform better, but not necessarily to the
same degree in the low temperature regime for all the traits considered
than the other cultigens examined. Relative growth rate (RGR) was found to
be superior over the rest of the traits in distinguishing between cold
sensitive and cold tolerant lines. It could, therefore, serve as a rapid
and reliable selection criterion for breeding for cold tolerance in melons.
Keywords
Cucumis melo, cold tolerance, cultigen, suboptimal cold temperature
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© Copyright 1997 - African Crop Science Society
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