000			02910nab a22003017a 4500
001			68094
003			MX-TxCIM
005			20251105084503.0
008			241112s1983 it |||po p||| 00| 0 eng d
022			_a0025-6153
022			_a2279-8013 (Online)
040			_aMX-TxCIM
041			_aeng
100	1		_aReddy, V.M. _937170
245	1	0	_aEndosperm characteristics associated with rate of grain filling and kernel size in corn
260			_aItaly : _bExperimental Institute for Cereal Research, _c1983.
520			_aThe associations were studied between endosperm cell number, starch granule number, rate of grain filling and mature kernel size of three corn (Zea mays L.) hybrids, Limagrain 1, Pride 1108, and Ornamental popcorn 392A, selected on the basis of their differences in kernel size. Hybrid Limagrain 1 (LG1) which had large kernels also had higher rates of grain filling, more endosperm cells, and more starch granules than the other two hybrids. Pride 1108 which had bigger kernels than Popcorn also had higher rates of grain filling, more endosperm cells, and more starch granules. Basal kernels had more endosperm cells (with the exception of Popcorn), more starch granules, higher rates of filling and larger sizes at maturity compared to the corresponding tip kernels. When data were compared across all genotypes, years, and kernels positions, highly significant positive correlations were found among the four characteristics measured. However, correlations between starch granule number and both rate of filling and final kernel size tended to be higher (r=0.971 and 0.935, respectively) than those between endosperm cell number and rate of filling and kernel size (r=0.733 and 0.813, respectively). Starch granule sizes of the three corn hybrids were examined with the help of Scanning Electron Microscopy. Among the three hybrids, starch granules of Popcorn were only slightly larger than than the starch granules of the other two hybrids. In another study, the association of starch granule number and mature kernel size among nine corn hybrids, with kernel weights ranging from 21 to 41g/100 kernels, was found to be highly positive (r=0.952). In total, results of the research suggest that rate of grain filling, and mature kernel size are highly dependent upon endosperm starch granule number established within the first 3 weeks after silk emergence. Starch granule number, in turn, is related to endosperm cell number.
546			_aText in English
650		7	_aMaize _2AGROVOC _91173
650		7	_aEndosperm _2AGROVOC _91097
650		7	_aSeed filling _2AGROVOC _91911
650		7	_aKernels _2AGROVOC _91168
650		7	_aStarch _2AGROVOC _95810
650		7	_aGranules _2AGROVOC _934331
700	1		_aDaynard, T.B. _937171
773	0		_dItaly : Experimental Institute for Cereal Research, 1983. _gv. 28, no. 4, p. 339-355 _tMaydica _wG444598 _x0025-6153
942			_2ddc _cJA _n0
999			_c68094 _d68086