TY - JOUR
T1 - Seed growth of desi and kabuli chickpea (Cicer arietinum L.) in a short-season Mediterranean-type environment
AU - Davies, S.L.
AU - Turner, Neil
AU - Siddique, K.H.M.
AU - Plummer, Julie
AU - Leport, L.
PY - 1999
Y1 - 1999
N2 - The influence of terminal drought on the seed growth of 3 chickpea (Cicer arietinum L.) genotypes was examined in a field experiment at Merredin, Western Australia. Tyson, a small-seeded desi cultivar, ICCV88201, a desi breeding line (sister line to the recently released Sona cultivar) with medium-sized seed, and Kaniva, a kabuli cultivar with large seed, were grown under rainfed and irrigated conditions. In the rainfed plots, leaf water potential had decreased from above -1.2 MPa to about -2.5 MPa and net photosynthesis from 21 to 29 mu mol CO2/m(2).s to below 10 mu mol CO2/m(2).s, by the time seed filling commenced. Rainfed plants had significantly fewer pods than irrigated plants, regardless of genotype. In rainfed plants average seed weight was reduced by 19, 23 and 34% and yield by 74, 52 and 72% in Tyson, ICCV88201, and Kaniva respectively. Individual pods were tagged at pod set on previously-selected representative plants and were weighed separately from the rest of the plant over 6 subsequent harvests so that the rate and duration of seed fill could be measured. Genotypic differences in the maximum rate of seed fill were found to exist in chickpea. In both irrigated and rainfed conditions, Kaniva had the highest maximum rate of seed fill followed by ICCV88201 and Tyson. Both the rate and duration of seed growth were reduced in the rainfed plants, regardless of genotype. Reductions in the dry weight of the pod shell suggest that the remobilisation of dry matter from the pod may contribute 9-15% of the seed weight in rainfed chickpea.
AB - The influence of terminal drought on the seed growth of 3 chickpea (Cicer arietinum L.) genotypes was examined in a field experiment at Merredin, Western Australia. Tyson, a small-seeded desi cultivar, ICCV88201, a desi breeding line (sister line to the recently released Sona cultivar) with medium-sized seed, and Kaniva, a kabuli cultivar with large seed, were grown under rainfed and irrigated conditions. In the rainfed plots, leaf water potential had decreased from above -1.2 MPa to about -2.5 MPa and net photosynthesis from 21 to 29 mu mol CO2/m(2).s to below 10 mu mol CO2/m(2).s, by the time seed filling commenced. Rainfed plants had significantly fewer pods than irrigated plants, regardless of genotype. In rainfed plants average seed weight was reduced by 19, 23 and 34% and yield by 74, 52 and 72% in Tyson, ICCV88201, and Kaniva respectively. Individual pods were tagged at pod set on previously-selected representative plants and were weighed separately from the rest of the plant over 6 subsequent harvests so that the rate and duration of seed fill could be measured. Genotypic differences in the maximum rate of seed fill were found to exist in chickpea. In both irrigated and rainfed conditions, Kaniva had the highest maximum rate of seed fill followed by ICCV88201 and Tyson. Both the rate and duration of seed growth were reduced in the rainfed plants, regardless of genotype. Reductions in the dry weight of the pod shell suggest that the remobilisation of dry matter from the pod may contribute 9-15% of the seed weight in rainfed chickpea.
KW - SEED SIZE
KW - SEED FILLING
KW - TERMINAL DROUGHT
KW - PHOTOSYNTHESIS
U2 - 10.1071/EA98134
DO - 10.1071/EA98134
M3 - Article
SN - 0816-1089
VL - 39
SP - 181
EP - 188
JO - Australian Journal of Experimental Agriculture
JF - Australian Journal of Experimental Agriculture
ER -