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Culm Length and Differential Development of Three Foliar Leaves of Near‐Isogenic Wheat Lines 1
Author(s) -
Chowdhry A. Rehman,
Allan Robert E.
Publication year - 1966
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1966.0011183x000600010008x
Subject(s) - biology , parenchyma , elongation , seedling , botany , phenotype , gene , differential (mechanical device) , horticulture , genetics , engineering , aerospace engineering , materials science , metallurgy , ultimate tensile strength
Five near‐isogenic lines of wheat seedlings that differed in culm length and their two parents were studied to establish the relationship of culm length phenotype and genotype with differential development of the first, second, and third seedling leaves. Differential development of the corresponding leaves of these selections is generally positively related to culm length expression. Indirect evidence suggests that the genetic mechanisms which control culm length also control leaf development or that closely linked systems are inwflved. Furthermore, differential leaf development is brought about by differential elongation of leaf mesophyll parenchyma cells. Differential development of the leaves of the same selection seems more dependent upon differential parenchyma cell number rather than length of leaf parenchyma cells. On a per‐unit‐length basis, leaves of the short selections possessing semidwarfing genes are heavier than those carrying no semidwarfing genes, suggesting some physiological limitation for semidwarf selections to produce maximum cell elongation.