CD Tesis
Sistem Pewarisan Sifat Perkembangan Biji Dan Komponen Hasil Kacang Hijau (Vigna Radiata L.) Pada Berbagai Kerapatan Tanam
Mung bean (Vigna radiate L.) is an important arable crop commodity and potential to be cultivated in Indonesia. Seed of mung bean contain almost complete nutrition including carbohydrate, protein, lipid, vitamins and trace elements. Production of mung bean in Indonesia and specifically in Riau Province tended to decrease from year to years in the last several years. The decrease in mung bean production is due to unsuitable land requirement, not ample crop cultural practices, and limited use of good quality of seed. So that, it is importance to develop varieties suitable to specific environment such as marginal land, and or adaptable to grow in mixed cropping system with other crops. Therefore, this study aims to determine the inheritance of several characters of seed development and yield components in a population of mung bean plants.
This research was conducted using a randomized design consisting of two factors in three replications. Eight varieties of mung beans including 4 local varieties, ie; Rambatan, Rokan Hulu, Evania, Sleman Super and 4 high yielding varieties, ie; Srikandi, Sampeong, Gelatik, and Vima-1 were planted under three planting density such as 900000, 100000, and 110000 pants per ha. Seeds of each variety were planted in experimental plots with the size of 280 cm x 240 cm under the standard cultivation practice. Traits observed were flowering date, number of branches per plant, plant height, harvest date, seed dry weight at 15 HSP, seed dry weight at 22 HSP, dry weight at harvets, dry matter accumulation rate, effective seed filling time, number of seeds per pod, number of seeds per plant, seed weight per plant, 100 seed weight and seed yield per m2. Data analyses were performed by ANOVA using SAS and followed by Tukey's test at the 5% level. Variance components and heritability were calculated according to Hallauer at al. (2010), while genetic correlation coefficient and selection response were estimated by the method of Falconer (1990).
The results indicated that phenotypic variability was quiet wide for all characters observed. Genetic component of variance was relatively wide for all traits; however, several characters had also very large value of environmental variance including harvest date, dry weight of seed, dry matter accumulation rate, branch number per plant, number of filled pod, seed number per plant, seed weight per plant, and seed weight per m2. High heritability values were shown by flowering date, plant height, seed effective filling duration, seed dry weight at 15 HSP and 22 HSP, number of seeds per pod, and weight of 100 seeds. Moderate
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values of heritability were recorded for harvest date, dry matter accumulation rate, effective seed filling time, number of branches, number of pods per plant, number of pods per plant and seed yield per m2.
In general, phenotypic correlation of all characters were significant to grain yield per m2. A significant negative genetic correlation were found between yield per m2 to plant height, flowering date, effective filling duration. Positive genetic correlation was recorded between seed yield per m2 to dray matter accumulation rate, number of seeds per plant, weight of seeds per plant and weight of 100 seeds.. The indirect selection response value to obtain effective high seed yield per m2 was using selection criteria against number of filled pods per plant, number of seed per pods, number of seeds per plant, weight of seeds per plant and weight of 100 seeds. This study indicated that affective and efficient characters to obtain high yielding potential varieties was selecting of number of seeds per plant, weight of seeds per plant and weight of 100 seeds.
Key words: Mung bean, heritability, genetic diversity, selection response, genetic correlation.
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