scholarly journals Diallel Cross in Potato Cultivars (Solanum tuberosum L.) and Evaluation of Their Progenies Under Deficit Water Stress

2020 ◽  
Vol 73 (2) ◽  
Author(s):  
Ghasem Rahimi Darabad ◽  
Mohammad Reza Hassandokht ◽  
Davoud Hassanpanah ◽  
Amir Mousavi
Keyword(s):  
Combining Ability ◽  
Tuber Yield ◽  
Agronomic Traits ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Diallel Cross ◽  
Growth Conditions ◽  
Potato Cultivars ◽  
Water Deficit Stress ◽  
Breeding Populations

This study was performed to assess superior potato clones for agronomic traits and water deficit stress tolerance in laboratory and greenhouse settings over 3 years (2016–2018). Four cultivars, ‘Satina,’ ‘Caesar,’ Savalan,’ and ‘Agria’ were used as parents and crossed by mutual hybridization based on a diallel cross using the Griffing III method. Of 279 successful crosses, 7,980 true potato seeds from 12 breeding populations were obtained, from which 2,313 seeds germinated and 244 hybrids were selected. The selected hybrids were cultured in triplicate in a splitplot based on a randomized complete block design. The main factor consisted of three levels of irrigation (100%, 80%, and 60% of available water) and a subfactor of 12 populations (♀‘Agria’ × ‘Satina’♂, ♀‘Agria’ × ‘Caesar’♂, ♀‘Agria’ × ‘Savalan’♂, ♀‘Satina’ × ‘Agria’♂, ♀‘Satina’ × ‘Caesar’♂, ♀‘Satina’ × ‘Savalan’♂, ♀‘Caesar’ × ‘Satina’♂, ♀‘Caesar’ × ‘Agria’♂, ♀‘Caesar’ × ‘Savalan’♂, ♀‘Savalan’ × ‘Satina’♂, ♀‘Savalan’ × ‘Agria’♂, and ♀‘Savalan’ × ‘Caesar’♂). In all three environmental conditions, the highest tuber yield and tuber weight per plant were related to ♀‘Agria’ × ‘Caesar’♂. The most general combining ability that produced positive and significant tuber yield in mild and severe stress conditions was in ‘Agria’ and ‘Caesar’ cultivars. Therefore, these cultivars can easily transfer these traits to offspring and increase the expression of these traits. The specific combining ability between potato cultivars had positive and significant effects on tuber yield under the growth conditions tested. These crosses can be used for the production of drought resistant potato clones.

scholarly journals Combining ability in maize hybrid for yield-related traits and silage production

2020 ◽  
pp. 1898-1904
Author(s):  
Flávia Nicácio Viana ◽  
Jocarla Ambrosim Crevelari ◽  
Gabriel Moreno Bernardo Gonçalves ◽  
José Arantes Ferreira Júnior ◽  
Débora Evellin Gonçalves França ◽  
...  
Keyword(s):  
Combining Ability ◽  
Agronomic Traits ◽  
Block Design ◽  
Diallel Cross ◽  
F1 Hybrids ◽  
Fresh Matter ◽  
Breeding Programs ◽  
The North ◽  
Maize Cultivars ◽  
Silage Production

Maize cultivars developed for silage production are desirable because ensiling enables the production of high-quality feed and, increases farmers profit. Diallel cross is an efficient and advantageous mating technique that allows the selection of the best parents and crossings. The objective of this study was to estimate the general combining ability (GCA) and specific combining ability (SCA) of hybrids and their parents and to evaluate promising hybrid crosses that can be used in breeding programs. Six genotypes were crossed in a complete diallel system. Fifteen hybrid combinations, six parents, and three commercial controls were evaluated in the 2017/2018 growing season in the north and northwest regions of Rio de Janeiro state, Brazil. Nine agronomic traits were analyzed at the silage stage: plant and ear height, stem diameter, stand, husk covering, number of cobs, husked ear weight, unhusked ear weight, and fresh mass yield. The study employed a completely randomized block design with four repetitions. The parents UENF 2210, Piranão 12, and UENF 2208 presented higher GCA values for fresh matter yield and were indicated for the generation of single cross (F1) hybrids. The parental combinations of UENF 2208  Piranão 12, UENF 2208  UENF 2205, and UENF 2209  UENF 2205 had high SCA for most of the evaluated traits and were promising for the use in breeding programs. The crosses with higher average yield were UENF 2208  Piranão 12, UENF 2210  Piranão 12, and UENF 2208  UENF 2205

scholarly journals Tuber yield and nutrient balance of potato (Solanum tuberosum L.) Cultivation as influenced by different nutrients management under AEZ-28

2015 ◽  
Vol 39 (4) ◽  
pp. 641-659
Author(s):  
MAHS Jahan ◽  
MAR Sarkar ◽  
NCD Barma ◽  
MNA Mondal ◽  
MNS Ferdousi
Keyword(s):  
Nutrient Management ◽  
Tuber Yield ◽  
Agricultural Research ◽  
Management Practice ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Nutrient Balance ◽  
Research Centre ◽  
Gross Margin ◽  
Randomized Complete Block Design

A field experiment was conducted at Regional Wheat Research Centre of the Bangladesh Agricultural Research Institute, Joydebpur, Gazipur for 2 consecutive years during 2006-07 and 2007-08. The objectives were to find out the optimum nutrient management practice on tuber yield, nutrient balance and economics of potato cultivation. Twelve nutrient management treatments were tested in a randomized complete block design with 3 replications. Treatments were T1=HYG (0-198-44-194-24-6-1.2), T2=MYG (0-140-34-138-18-4.5-0.9), T3=IPNS (10000-168-38-170-18-6-1.2), T4=STB (0-171-40-164-22-5-1), T5=FP (0-97-16-91-0-0-0), T6=CON (0-0-0-0-0-0-0), T7=HYG+CRI, T8=MYG+CRI, T9=IPNS+CRI, T10=STB+CRI, T11=FP+CRI, T12=CON+CRI kg ha-1 CDNPKSZnB for potato. The highest tuber yield of potato was obtained from STB+CRI (27.64 t ha-1) followed by IPNS+CRI (27.35 t ha-1), STB (27.10 t ha-1), IPNS (26.83 t ha-1), HYG+CRI (26.52 t ha-1) and HYG (26.10 t ha-1) in 2006- 07. Similar trend was found in 2007-08. The highest tuber yield and yield contributing parameters were noticed in CRI plots than without CRI. Except N, remaining nutrient balance like P K S Zn and B were found positive in case of HYG, MYG, IPNS and STB along with or without CRI nutrient managements. The balance was found almost negative in case of FP and CON. The highest BCR was observed in STB+CRI (3.96) followed by STB (3.93), IPNS+CRI (3.76), and IPNS (3.74). The higher gross return (Tk. 283331 ha-1) and also gross margin (Tk. 211761 ha-1) was observed from the same treatment. DOI: http://dx.doi.org/10.3329/bjar.v39i4.22544 Bangladesh J. Agril. Res. 39(4): 641-659, December 2014

scholarly journals Diallel cross among fresh market tomato inbreeding lines

2012 ◽  
Vol 30 (2) ◽  
pp. 246-251 ◽  
Author(s):  
Lívia M de Souza ◽  
Maria Elisa AGZ Paterniani ◽  
Paulo César T de Melo ◽  
Arlete MT de Melo
Keyword(s):  
Combining Ability ◽  
Yield Components ◽  
Block Design ◽  
Diallel Cross ◽  
Fruit Yield ◽  
Soluble Solids ◽  
Width Ratio ◽  
Parental Line ◽  
Fresh Market ◽  
Fruit Number

The general combining ability (GCA), specific combining ability (SCA), and heterosis were studied in a complete diallel cross among fresh market tomato breeding lines with reciprocal excluded. Fifteen genotypes (five parents and ten hybrids) were tested using a randomized complete block design, with three replications, and the experiments were conducted in Itatiba, São Paulo state, Brazil, in 2005/06. The yield components evaluated were fruit yield per plant (FP), fruit number per plant (FN), average fruit weight (FW); cluster number per plant (CN); fruit number per cluster (FC), fruit wall thickness (FT) and number of locules per fruit (NL). Fruit quality components evaluated were total soluble solids (SS); total titratable acidity (TA); SS/TA ratio, fruit length (FL); fruit width (WI); length to width ratio (FL/WI). The data for each trait was first subjected to analysis of variance. Griffing's method 2, model 1 was employed to estimate the general (GCA) and specific (SCA) combining abilities. Parental and hybrid data for each trait were used to estimate of mid-parent heterosis. For plant fruit yield, IAC-2 was the best parental line with the highest GCA followed by IAC-4 and IAC-1 lines. The hybrids IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-4 showed the highest effects of SCA. High heterotic responses were found for fruit yield and plant fruit number with values up to 49.72% and 47.19%, respectively. The best hybrids for fruit yield and plant fruit number were IAC-1 x IAC-2, IAC-1 x IAC-4 and IAC-2 x IAC-5, for fruit yield and plant fruit number, the main yield components.

scholarly journals Genetic parameters and combining ability of some important traits in rice (Oryza sativa L.)

Genetika ◽  
2017 ◽  
Vol 49 (3) ◽  
pp. 1001-1014 ◽  
Author(s):  
Hasanalideh Haghighi ◽  
Ezatollah Farshadfar ◽  
Mehrzad Allahgholipour
Keyword(s):  
Combining Ability ◽  
Genetic Parameters ◽  
Amylose Content ◽  
Oryza Sativa L ◽  
Block Design ◽  
Regression Line ◽  
Diallel Cross ◽  
Combining Ability Analysis ◽  
Additive Gene ◽  
F2 Generation

In order to study the combining ability, genetic parameters and gene actions of yield, yield components and quality characters in rice, fifteen F2 generation of a 6?6 diallel cross, excluding reciprocals, was grown in a randomized complete block design (RCBD) with three replications. The results of analysis of variance showed significant differences between the genotypes for grain yield (GY), 100-grain weight (HGW), number of panicles per plant (PN), panicle length (PL), number of full grains per panicle (FGN) and for quality characters including amylose content (AC) and gel consistency (GC). The results of combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were significant for characters GY, FGN, GC, AC, HGW and PN indicating the involvement of additive and non-additive effects in their inheritance, however high amounts of Bakers ratio remarked that additive gene effect had more portion in controlling these traits. The best combiners for GY, HGW, FGN, PN and PL, were RI18447-2, IR 50, Daylamani, RI18430-46 and Daylamani respectively. For AC and GC, the best combiner was Daylamani. Hayman's graphs showed that regression line passed below the origin cutting Wr axis in the negative region for HGW, PN, PL and GC, indicating the presence of over dominance. Estimates of genetic parameters showed significant amount of H1 and H2, and non-significant amount of D for the characters GY, PN, PL and GC, which confirmed the existence of dominance in the inheritance of these traits.

scholarly journals Performance of potato (Solanum tuberosum L.) varieties with and without straw-mulch at Shankharapur, Kathmandu, Nepal

2020 ◽  
Vol 3 (2) ◽  
pp. 193-204
Author(s):  
Kalyani Shrestha ◽  
Shrawan Kumar Sah ◽  
Reeti Singh ◽  
Yam Narayan Devkota
Keyword(s):  
Tuber Yield ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Medium Size ◽  
Tuber Weight ◽  
Potato Varieties ◽  
Straw Mulch ◽  
Crop Varieties ◽  
Randomized Complete Block Design ◽  
Benefit Cost

The suitability of crop varieties in a particular location determines the productivity of crops. A field experiment was conducted from February to May 2020 at Shankharapur, Kathmandu, Nepal to evaluate the growth and productivity of potato varieties with and without mulch. Five potato varieties (Cardinal, Janakdev, Khumal Bikas, MS- 42.3, Panauti Local) were evaluated under straw-mulch and no-mulch conditions. The treatments were arranged in two factorial Randomized Complete Block Design (RCBD) with 3 replications. The results revealed that the highest tuber yield was produced by Janakdev (34.29 t ha-1) followed by Panauti Local (29.52 t ha-1). Similarly, straw-mulch gave higher yield (25.9 t ha-1) as compared with no mulch condition (21.73 t ha-1). The higher tuber yield in the Janakdev and Panauti Local was because of higher tuber weight per hill, higher number and weight of medium size (50 -100 g) and oversize (> 100 g) tuber per hill. Similarly, higher yield in straw mulch was due to higher number and weight of tuber per hill. Higher gross return, net return was observed and the benefit cost ratioin varieties Janakdev (4.08) and Panauti Local (3.53) and rice straw mulch (2.88). Therefore, potato varieties Janakdev and Panauti Local with straw mulch are most suitable for Kathmandu like climate for improving productivity and profitability.

scholarly journals Agronomic traits and chemical composition of single hybrids of sweet corn

2011 ◽  
Vol 29 (4) ◽  
pp. 531-536 ◽  
Author(s):  
Angela Kwiatkowski ◽  
Edmar Clemente ◽  
Carlos Alberto Scapim
Keyword(s):  
Chemical Composition ◽  
Crop Yield ◽  
Combining Ability ◽  
Grain Quality ◽  
Sweet Corn ◽  
Agronomic Traits ◽  
Block Design ◽  
Research Station ◽  
Randomized Block Design ◽  
Fixed Model

In Brazil, the greengrocery market of sweet corn has been expanding along the country. In contrast, there have been few agri-industries canning sweet corn (Zea mays) because of the lack of cultivars with agronomic characteristics proper to industrial purposes. The purpose of this study was to evaluate the general combining ability (GCA) of seven inbred lines of sweet corn, and the specific combining ability (SCA) of their hybrid combinations based on their agronomic traits, and the chemical composition of the grain. In the growing season 2006/2007, twenty-one single hybrids were evaluated in the Iguatemi Research Station, Maringá County, Northwestern Paraná, in Brazil using a complete randomized block design with four replications. Data were subjected to the analysis of variance and the genotypes were clustered by the Scott-Knott test. We estimated the GCA and SCA effects using the Griffing's method IV with the fixed model for plant height (PH), height of ear (EH), dehusked ears yield (DEY), reducing (RS) and total sugars (TS), starch (ST), proteins (PTN), ether extract (EE) and fibers (FB). The inbred line L4, which was originated from the 'Doce de Cuba', had the best GCA for crop yield and grain quality and therefore should be used in the next hybrid combinations. The hybrids L4xL5 and L3xL7 were the most promising with regard to crop yield and grain quality.

scholarly journals Effects of Time of Earthing Up on Yield and Yield Parameters of Irish Potato (Solanum Tuberosum L.) in Zaka District, Zimbabwe

2020 ◽  
Vol 1 (1) ◽  
pp. p39
Author(s):  
Nyasha Sakadzo ◽  
Fortune Tafirenyika ◽  
Kasirayi Makaza
Keyword(s):  
Solanum Tuberosum ◽  
Tuber Yield ◽  
Smallholder Farmers ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Tuber Quality ◽  
Marketable Tuber ◽  
Yield Parameters ◽  
Plant Emergence ◽  
Four Levels

Potato (Solanum tuberosum L) is a strategic national food security crop in that can be used as a supplement for carbohydrates. It is the fastest growing staple food crop and source of income for poor smallholder farmers. There is limited documentation on effects of earthing up irish potatoes on yield and yield components in Zimbabwe. A field experiment was conducted in Zaka district of Masvingo province in Zimbabwe during the 2018/19 cropping season. The aim of the study was to investigate the effect of time of earthing up on yield and yield parameters of BP1 potato variety. The treatments consisted of four levels of time of earthing up (no earthing up (control), three, four and five weeks after plant emergence), replicated three times on a Randomized Complete Block Design (RCBD). Results on earthing-up at three weeks recorded significantly (P<0.013) the highest total tuber yield (21.97 t ha-1) which is 10% higher compared to no earthing up which recorded 14.43 t ha-1. Moreover, earthing up at two weeks had the least number of greening tuber yield (3%), 11% pest damaged tuber yield, 6% unmarketable tuber yield and 45% marketable tuber yield. This is in contrast with no earthing up which recorded 91% greening tuber yield, 25.3% on pest damaged tubers, 59% on unmarketable tubers and 10% marketable tuber yield. Based on the results, first earthing up should be done at three weeks after complete plant emergence at the study area under rain fed conditions for the production of potatoes with improved yield and better tuber quality.

Genetic Assessment of Combining Ability for Seed-Yield and Its Related Traits in Soybean [Glycine max (L.) Merrill]

2020 ◽  
Author(s):  
Gbemisola Oluwayemisi Ige ◽  
Godfree Chigeza ◽  
Subhash Chander ◽  
Abebe Tesfaye Abush ◽  
David Kolawole Ojo ◽  
...  
Keyword(s):  
Seed Yield ◽  
Combining Ability ◽  
Agronomic Traits ◽  
Block Design ◽  
Days To Flowering ◽  
Randomized Complete Block Design ◽  
Glycine Max L ◽  
Improvement Programme ◽  
Genetic Assessment ◽  
Made In

Crosses were made in line × tester mating design between a set of five IITA soybean released varieties and three plant introduced (PI) accessions obtained from World Vegetable Center, Taiwan. In order to produce sufficient seeds, F1 crosses were selfed, subsequently F2 populations along with their parents were planted in a randomized complete block design at two locations in Nigeria with three replications. Agronomic traits viz. days to flowering, days to poding, plant height, number of pods/plant and seed yield/plant were measured. Testers and lines showed significant differences for all the measured traits except days to flowering for testers. Considering the significance and magnitude of general combining ability (GCA) effect, line TGx 1988-5F was observed desirable for earliness, while line TGx 1989-19F was the best combiner for number of pods/plant and seed yield/plant. On the other hand, best tester for seed yield was PI 230970. Crosses TGx 1835-10E × PI 459025B and TGx 1987-62F × PI 459025B had significant and highest SCA effect for seed yield/plant. These two crosses appeared to be most promising for soybean yield improvement programme.

COMBINING ABILITY OF TOMATO GENOTYPES FOR IMPROVED SALT TOLERANCE

2001 ◽  
Vol 48 (4) ◽  
pp. 345-352
Author(s):  
L. Dessalegne ◽  
P. D. S. Caligari
Keyword(s):  
Salt Tolerance ◽  
Combining Ability ◽  
Yield Components ◽  
Management Practices ◽  
Block Design ◽  
Diallel Cross ◽  
Fruit Yield ◽  
Gene Effects ◽  
Growing Conditions ◽  
Tomato Genotypes

The combining ability of four tomato genotypes (Lycopersicon esculentum Mill.) for salt tolerance was determined by investigating the progeny from a 4 × 4 diallel cross. Sixteen progenies (F1s, selfs and reciprocals) were evaluated at three levels of salinity (0%, 1.0%, 1.5%) in a complete block design with four replications under greenhouse conditions. The analysis of the genetic component revealed that the mode of inheritance of salt tolerance appeared to be different to that of plant characters and salinity levels as measured by plant height and fruit yield components. However, the fruit count was consistently controlled by additive gene effects. The specific crosses Moneymaker (MM) × Red Alert (RA) and Ailsa Craig (AC) × Gardener's Delight (GD) produced the highest yield. The small-fruited parents, Red Alert and Gardener's Delight, had higher general combining ability value for salt tolerance than the large-fruited, Ailsa Craig and Moneymaker, for fruit yield components. RA and GD were superior parents in transmitting salt tolerance. The study revealed that plant selection could be used to improve varietal performance for salt tolerance. It is also suggested that the potential variation in commercial cultivars could be exploited to improve adaptability to more saline growing conditions till resistant cultivars are developed through crosses with the wild species or genetic transformation with optimum management practices.

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