INHERITANCE OF PROTEIN CONTENT IN PEA I. INHERITANCE OF PROTEIN CONTENT ON THE BASIS OF DIALLELIC CROSSES

PNL Volume 12

1980

RESEARCH REPORTS

INHERITANCE OF PROTEIN CONTENT IN PEA

I. INHERITANCE OF PROTEIN CONTENT ON THE BASIS OF DIALLELIC CROSSES

Swiecicki, W.K.

and M. Surma

Z. Kaczmarek,

Plant Experiment Station, Wiatrowo, Poland

Institute of Plant Genetics, Poznan, Poland

Polish agriculture is faced with a demand for developing high protein

pea varieties to serve as dry fodder components. Therefore, studies have

been undertaken to find out the mechanism of inheritance of protein content

in some selected pea varieties.

This part of the study was designed to determine estimates of general

and specific combining ability and of major genetic Parameters for a selected

set of pea lines. Two high yielding varieties ('Stral' and 'Flavanda')

and two lines from Wiatrowo (WTD 4011 and WTD 4015) were used for crossing

and diallel analyses. The latter contain approximately 30% crude protein

and are prospective for genetic and breeding experiments. The aforementioned

varieties and lines were crossed in a 4x4 daillel arrangement. A field experi-

ment was set up comprising the 4 parents and 12 hybrids in five randomized

complete blocks. Statistical analysis was made according to Hayman (1954),

Griffing (1956), and Dobek et al. (1977, 1978).

Table 1 presents the mean protein content in seeds of the parents and

F2. Statistical analysis indicated significant differences for the general

and specific combining ability. The effects of reciprocal crossing were

insignificant. The diallel analysis indicated adequacy of the additive-

dominance model of gene action for the analyzed set of genotypes. It allowed

for an appraisal of Mather's genetic parameters. They are relatively equal:

D=14.85+0.74; F=6.0411.91; H1=5.20±2.15; H2=4.47±1.99; h²=7.00±1.35.

The values of these parameters indicate the significance of the effects

of additive gene action and dominance effects, but there was dominance in

all crosses towards lower protein content.

The degree of dominance equals 0.59. Calculated broad and narrow sense

heritability coefficients were 92.7% and 75.1%, respectively.