Character association for seed yield and yield traits in Saraca asoca (Roxb.) De Wilde

As the result of the research conducted in 2018–2020 at the All-Russian Rapeseed Research Institute, a scheme of primary seed farming of self-pollinated lines and F1 hybrids of spring rape has been developed, over 45 varieties have been created, including self-pollinated lines, simple interline and three-line hybrids. A comparative appraisal of spring rape inbred lines (female parents) and hybrids of the two most common systems of cytoplasmic male sterility (CMS) – Polima (LHS-1, LMS-1, LMS-2) and Ogura (LCS-4, LCS-5, LCS-6), was made. Yield traits distinctiveness in simple sterile hybrids of Polima and Ogura types was studied; it has been asserted that when compared to inbred maternal lines the traits predominate in hybrids, the indices are higher by 24.8% in the hybrids based on sterile Ogura cytoplasm and by 10.7% in the hybrids on sterile Polima cytoplasm. In our studies, self-pollinated lines, the maternal components of the hybrids, are inferior to the hybrids in terms of crude fat content in seeds, it is 6.5% lower than in the hybrid forms for the CMS Pol system and 17.3% lower for the forms of the CMS Ogu system. It was determined that the seed yield of CMS systems hybrids of Ogura type is on average 22.0% higher than the seed yield of Polima hybrids. The starting material for primary seed production of rapeseed hybrids based on CMS has been developed.

Download Full-text

Genetic divergence in mung bean

Legume Research - An International Journal ◽

10.18805/lr.v0i0.7012 ◽

2017 ◽

Author(s):

M. Sen ◽

D. K. De

Keyword(s):

Genetic Diversity ◽

Seed Yield ◽

Mung Bean ◽

Seed Weight ◽

Yield Traits ◽

Cluster Distance ◽

Percent Contribution ◽

Statistical Distance ◽

Hybridization Programme ◽

100 Seed Weight

The present study was undertaken to provide information on the nature and magnitude of genetic diversity among 30 mung bean genotypes for yield traits by using Mahalanobis’s D2 statistics. Thirty genotypes could be grouped in 6 clusters, cluster VI showed maximum intra-cluster distance while the highest inter-cluster distance was observed between cluster III and VI. Cluster II recorded highest means for seeds per pod, 100 seed weight, seed yield per plant and shelling %. The percent contribution towards genetic diversity was highest for shelling percentage (17.70) followed by seed yield per plant (16.55) and number of clusters per plant (14.71). From the divergence analysis, it may be concluded that the genotypes belonging to different clusters separated by high estimated statistical distance may be used in the hybridization programme for developing high yielding mung bean varieties. Five genotypes viz., PDM-11, TARM-2, TM-98-50, PDM 54 and Basanti could be identified as most useful in the future breeding programme.

Download Full-text

Genetic variability, character association and path analysis in Brassica rapa L. Genotypes

Bangladesh Journal of Agricultural Research ◽

10.3329/bjar.v40i2.24570 ◽

2015 ◽

Vol 40 (2) ◽

pp. 305-323

Author(s):

S Naznin ◽

MA Kawochar ◽

S Sultana ◽

MSR Bhuiyan

Keyword(s):

Path Analysis ◽

Brassica Rapa ◽

Seed Yield ◽

Selection Criteria ◽

Significant Positive Correlation ◽

Path Coefficient ◽

Early Maturity ◽

Character Association ◽

High Heritability ◽

Genotypic Coefficient Of Variation

Thirty three genotypes of Brassica rapa L. were evaluated in order to find out their inter-genotypic variability; character association and path coefficient of seed yield/plant and its component characters. BARI sarisha-6 x TORI-7 S-45 showed best result in terms of early maturity (75 days) and higher seed yield/plant (5.28g) than check varieties. The character, plant height, was highly influenced by the environment whereas, all other characters influenced the least. Number of secondary branches/plant showed the highest phenotypic and genotypic coefficient of variation. Moreover, number of siliquae/plant, number of secondary branches/plant and number of primary branches/plant showed high heritability (93.16%, 75.69% and 68.03%, respectively) couple with high genetic advance in percent of mean (37.74%, 73.55% and 26.82%, successively). The seed yield/plant showed significant positive correlation with number of siliquae/plant (rg = 0.7011**, rp = 0.5684**), number of primary branches/plant (rg = 0.5611**, rp = 0.4016*) and number of secondary branches/plant (rg = 0.5160**, rp = 0.4098*) revealing that selection based on these traits would be judicious. Path analysis showed that the number of siliquae/plant (0.4679), number of primary branches/plant (0.2823) and number of secondary branches/plant (0.0092) were the most important contributors to seed yield/plant. The results indicated that number of siliquae/plant, number of primary branches/plant and number of secondary branches/plant can be used as selection criteria to increase seed yield/plant in rapeseed.Bangladesh J. Agril. Res. 40(2): 305-323 June 2015

Download Full-text

Character association of seed yield and its components in some lentil (Lens culinaris Medik.) genotypes under normal and late sown condition

Legume Research - An International Journal ◽

10.18805/lr-3776 ◽

2017 ◽

Author(s):

Debashree Roy Choudhury ◽

Sabyasachi Kundagrami

Keyword(s):

Seed Yield ◽

Lens Culinaris ◽

Morphological Characters ◽

Correlation Study ◽

Path Coefficient ◽

Path Coefficient Analysis ◽

Yield Improvement ◽

Analysis Study ◽

Character Association ◽

Positive Direct

Character association in forty eight genotypes of lentil was studied for nine different agro-morphological characters in normal and late sown conditions. Normal sown condition was taken into consideration as optimum environment and late sown as heat stressed environment. The correlation study revealed consistent positive significant character association (at genotypic and phenotypic levels) of pods per plant with seed yield per plant in both sowing conditions. So this character may be considered for yield improvement. From path coefficient analysis study it was revealed that pods per plant showed consistently positive direct effect on seed yield/plant for both sowing conditions.

Download Full-text

Responses of Seed Germination, Seedling Growth, and Seed Yield Traits to Seed Pretreatment in Maize (Zea maysL.)

The Scientific World JOURNAL ◽

10.1155/2014/834630 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 12

Author(s):

Yu Tian ◽

Bo Guan ◽

Daowei Zhou ◽

Junbao Yu ◽

Guangdi Li ◽

...

Keyword(s):

Seed Germination ◽

Seed Yield ◽

Seedling Growth ◽

Germination Rate ◽

Seed Priming ◽

Grain Weight ◽

Shoot Biomass ◽

Control Group ◽

Yield Traits ◽

Seed Pretreatment

A series of seed priming experiments were conducted to test the effects of different pretreatment methods to seed germination, seedling growth, and seed yield traits in maize (Zea maysL.). Results indicated that the seeds primed by gibberellins (GA), NaCl, and polyethylene glycol (PEG) reagents showed a higher imbibitions rate compared to those primed with water. The final germination percentage and germination rate varied with different reagents significantly (P<0.05). The recommended prime reagents were GA at 10 mg/L, NaCl at 50 mM, and PEG at 15% on account of germination experiment. 15% PEG priming reagent increased shoot and root biomass of maize seedling. The shoot biomass of seedlings after presoaking the seeds with NaCl reagent was significantly higher than the seedlings without priming treatment. No significant differences of plant height, leaf number, and hundred-grain weight were observed between control group and priming treatments. Presoaking with water, NaCl (50 mM), or PEG (15%) significantly increased the hundred-grain weight of maize. Therefore, seed pretreatment is proved to be an effective technique to improve the germination performance, seedling growth, and seed yield of maize. However, when compared with the two methods, if immediate sowing is possible, presoaking is recommended to harvest better benefits compared to priming method.

Download Full-text