|
Yesmin MA1, Salim M1, Monshi FI2, Hasan AK1*, Hannan A3, Islam SS4 and Tabassum R5 1Department of Agronomy, Bangladesh Agricultural University, Mymensingh,
Bangladesh
2Department of Genetics and Plant Breeding, Sylhet Agricultural University, Sylhet, Bangladesh
3Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh,
Bangladesh
4Department of Agronomy, Hajee Mohammad Danesh Science & Technology University, Dinajpur, Bangladesh
5Department of Crop Botany and Tea Production Technology, Sylhet Agricultural University, Sylhet, Bangladesh
Abstract
Rice is a staple food in terms of acreage and production in Bangladesh. The assessment of genetic variability in rice genotypes is essential to identify suitable characters for its further improvement. An experiment was carried out to study the morpho-physiological and genetic characteristics of
transplanted Aman (one of the important rice growing seasons in Bangladesh) rice cultivars. Ten Aman rice varieties were tested
as treatments and the experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The analysis of morpho-physiological traits in tested rice varieties demonstrated that the higher number of effective tillers per hill, panicle length, grains per panicle and 1000 grain weight was the most yield contributing traits those were influenced to produce higher grain yield. In terms of genetic traits analyses, all the studied traits exhibited high heritability (>60%) except panicle length. And in correlation studies, grain yield showed the significant positive correlation with 1000 seed weight, panicle length, effective tiller number per hill along with biological yield, straw yield and harvest index. Moreover, path coefficient analysis revealed that biological yield and harvest index showed a high and positive direct effect on grain yield. Thus, after studying different traits among ten varieties
of Aman rice there after considering the three categories, hybrid varieties performed better followed by HYV compared to traditional rice varieties. And the Dhanigold variety might be recommended as a higher yield producing cultivar along with the economic return.
Keywords:genetic characterization, morpho-physiology, Aman rice, agro ecological zone (AEZ)
Full Text : pdf
(669kb)
* - Corresponding Author
|
