scholarly journals Influence of sowing methods on biometric indicators of domestic and international rice varieties

2021 ◽  
Vol 244 ◽  
pp. 02029
Author(s):  
R. Tellyaev ◽  
M. Ergashev ◽  
B. Kodirov ◽  
A. Kholboev

This article presents the results of a study on the introduction of South Korean rice varieties, the influence of transplanting methods on the biometric indicators of local and foreign varieties, as well as the selection of varieties adapted for transplanting method using mechanization.

2002 ◽  
Vol 9 (1) ◽  
pp. 175-188 ◽  
Author(s):  
Charles R. Taylor ◽  
Kyung Hoon Kim ◽  
Dong Yul Kim ◽  
Hak Il Moon

2014 ◽  
Vol 70 (6) ◽  
Author(s):  
Elixon Sunian ◽  
Mohd. Solihen Jamal ◽  
Asfaliza Ramli ◽  
Othman Omar ◽  
Habibbudin Hashim ◽  
...  

CMS (cytoplasmic male sterile) line is one of the most important hybrid parents in hybrid rice production technology using Three-Line systems. Test-crosses for selection of candidate local maintainer lines were conducted using 24 rice varieties and two CMS-WA (wild abortive) lines IR78374A/B and 1A/B. The F1 of the two combinations, namely IR78374A/P519 and 1A/MR243 had less than 10% spikelet fertility (6.4 and 7.2%, respectively), indicated that P519 and MR243 are partially maintainers and could be used for the development of new locally adapted CMS lines. As a results, two CMS lines, namely 0025A/B and 0047A/B were generated after 5 to 6 successive backcrossing of IR78374A with P519 and 1A with MR243. The CMS 0025A/B and 0047A/B lines had maturation age which is comparable to other commonly grown inbred varieties. The percentage of stigma exertion rate for CMS 0025A/B and 0047A/B were 17.9 and 21.3%, respectively, lower than that of IR78374A/B (43.2%). Both showed poor out-crossing rate. CMS 0025A/B and 0047A/B are classified as long and slender grain. They had intermediate amylose content. Their gel consistency was hard, comparable to that of MR263 (medium).  CMS 0025A/B and 0047A/B lines were also moderately resistant to foliar blast disease and brown planthopper infestation.


2014 ◽  
Vol 48 (6) ◽  
pp. 1-9 ◽  
Author(s):  
Deok-Gyeong Seong ◽  
◽  
Young-Gwang Kim ◽  
Yong-Cho Cho ◽  
Hyun-Yul Shin ◽  
...  

2018 ◽  
Vol 25 (6) ◽  
pp. 651-658 ◽  
Author(s):  
Eun-Yeong Sim ◽  
Ji Yoon Lee ◽  
Jun Hyeon Cho ◽  
Mi-Ra Yoon ◽  
Ji-eun Kwak ◽  
...  

2019 ◽  
Vol 39 (04) ◽  
Author(s):  
Kasturi Majumder ◽  
Disharee Nath ◽  
Rambilash Mallick ◽  
Tapash Dasgupta

Thirty-six rice genotypes were evaluated for thirteen different quality parameters along with yield/plant to assess genetic estimates of the traits and the extent of genetic diversity among the varieties. Analysis of variance was conducted to determine GCV, PCV, heritability and GA of the genotypes with respect to all characters. Significant variation was observed in many traits among the genotypes offering scope for selection. Correlation analysis determined the nature of relationship among these characters. UPGMA studies revealed six major clusters and cluster I and II were the largest with maximum number of genotypes. The study identified that the varieties namely, Black Gora, Kalinga-2, Dudheswar, ARC 10086, IR-36, IR-64 and Nipponbare possessed good quality traits and high yield performance. The current study indicated that developing rice varieties for consumer acceptance with good grain quality traits along with high yield will be very useful in rice breeding and in selection of parents for hybridization to combine both high yield and improved quality traits.


2021 ◽  
Author(s):  
Jimmy Lamo ◽  
David Ochan ◽  
Desta Abebe ◽  
Zelalem Zewdu Ayalew ◽  
Anna Mlaki ◽  
...  

Since introduction of rice into Uganda in 1904, improvement of the irrigated and rain-fed lowland types was undertaken to address a number of production and quality constraints in three consecutive and overlapping phases. The initial phase was achieved through evaluation of introduction, selection of promising lines and subsequent release of the selected lines for production by the farmers. In the second phase, genetic potential of traits and characteristics of interest were analyzed and used to guide selection of suitable parents for hybridization and the third phase employed genotyping approach in screening and selection of the parental lines and the segregating populations to enhance the breeding efficiency for the traits of importance. Simultaneously, the key production constraints addressed included resistance to rice yellow mottle virus (RYMV), rice blast, bacterial leaf blight and narrow leaf spot diseases as well as submergence tolerance and cold tolerance. The quality traits considered for the improvement alongside the grain yield parameters were the grain aroma, amylose content, shape and size. These interventions have resulted into release and wide adoption of seven rice varieties in Uganda besides several breeding lines which have informally diffused into different major rice production agro-ecology. Subsequently, it can be concluded that a substantially strong and functional breeding platform for rice in Uganda has been established.


2014 ◽  
Vol 66 (2) ◽  
pp. 166-174 ◽  
Author(s):  
Heon Woong Kim ◽  
Jung Bong Kim ◽  
Soo-Muk Cho ◽  
Il Kyu Cho ◽  
Qing X. Li ◽  
...  
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