Premium
Dynamics of Dry Matter Accumulation in the Developing Grains of Three Wheat Genotypes with Contrasting Grain Weight
Author(s) -
Nagarajan S.,
Gambhir P. N.,
Gupta N. K.,
Pande P. C.
Publication year - 1996
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1996.tb00245.x
Subject(s) - dry matter , seeding , agronomy , sink (geography) , grain size , complementation , cultivar , biology , materials science , metallurgy , phenotype , biochemistry , cartography , geography , gene
The accumulation of dry matter and its major components was studied in developing grains of two bold seeded (Selection‐111 and IWP‐5308) and one small seeded (kalyansona) wheat genotypes grown in pot culture condition. It was observed that in kalyansona, a sharp reduction in grain water content during the critical stage of grain enlargement limits its size resulting in compact filling of grains. In the developing grains of Selection‐111 and IWP‐5308, the high rate of dry matter accumulation was associated with their larger grain sink size. However, their lower grain density compared to kalyansona could be explained on the basis of non‐complementation between synthetic component and grain size (structural component). This non‐complementation may be due to relatively higher thermosensitive synthetic mechanism in the bold seeded genotypes.