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1.
Dhungana Sanjeev Kumar Kim Il-Doo Adhikari Bishnu Kim Jeong-Ho Shin Dong-Hyun 《Journal of Crop Science and Biotechnology》2019,22(1):11-16
Journal of Crop Science and Biotechnology - Due to the negative consequences of synthetic herbicides use and their reducing effectiveness due to development of resistant weeds, promotion of... 相似文献
2.
Seed shattering is an undesirable characteristic of rice cultivars affecting field loss of grain yield before and during harvesting.
This research was designed to clarify the inheritance of the cracking characteristics of abscission layers formed between
the rice grains and its pedicel using F2 populations derived from the crossing of Milyang 23 and Ashahi. The results indicated that the cracking characteristic of
Milyang 23 was dominant to absence of cracking in Ashahi, and controlled by a single dominant gene. The degrees of grain shedding
were somewhat related with the cracking characteristics of the abscission layer. The breaking tensile strengths closely correlated
with the diameter of the supporting zone, the thickness of sclerenchyma tissue between the inner side of abscission layer
and the central vascular tissues in the lemma side, and in the palea side, respectively. Some negative correlations were observed
between the breaking tensile strengths and some agronomic traits such as plant height, culm length, panicle length, number
of matured grains, and the ratio of fertility. 相似文献
3.
Esterase isozymes in the leaf blade were observed in the F2 populations derived from the cross combination between a japonicaindica hybrid rice variety with EIZ 1 (EST
1
, EST
2
S
, EST
3
F
) and a japonica rice variety with EIZ 6 (EST
1
, EST
2
O
, EST
3
S
. The esterase isozyme of the 6A (EST
2
S
band was controlled by a dominant allele, while the esterase isozymes of 12A (EST
3
S
and 13A (EST
3
F
) bands were controlled by codominant alleles. No linkage relation was indicated while between EST
2
and EST
3
. The presence of esterase isozyme of 13A (EST
3
F
) band is related to the grain shedding habit and esterase isozyme of 13A (EST
3
F
) band itself is somewhat related to the cracking characteristics of the abscission layer. The presence of esterase isozyme
of 6A (EST
2
S
) band is related the days to heading and it might due to the panicle length and ratio of fertility. There was no difference
in the plant height, culm length, and number of tillers per hill between EIZ in the F2 population. Therefore, there were the relationships between esterase isozymes and some agronomic traits in rice plants. 相似文献
4.
Seed shattering is an undesirable characteristic of rice cultivars affecting the loss of grain yield before and during harvesting.
These grain losses are influenced by varietal characteristics. The histological peculiarities of the abscission region obtained
were different among rice varieties, and had a close relationship with grain shedding. In order to obtain information for
the breeding of new persistent shedding varieties, this study was designed to clarify the inheritance of grain shedding habits
in relation to the abscission layer. In the cross combination of two easily shedding varieties, Milyang 23, a japonica-indica
hybrid rice with cracked abscission layers and Ashahi, a japonica-type rice with uncracked abscission layers, the cracking
of parenchymatous cells in the abscission layer was controlled by a single dominant gene. The breaking tensile strength coincided
well with cracked and uncracked abscission layers. In four crosses between a persistent shedding variety without abscission
layers and two easily shedding varieties with cracked abscission layers, and two medium shedding varieties with uncracked
abscission layers, respectively, the formation of the abscission layer was controlled by a single dominant gene. The easily
shedding and persistent shedding habits coincided well when the abscission layers were both present and absent. The easily
shedding characteristics were dominant in cross combination. The close negative correlations were recognized between degrees
of grain shedding and breaking tensile strengths. 相似文献
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