PNABD246.pdf

*0015 Asian Vegetable Research and Development Center. 1985. Mungbean.
ASIAN VEGETABLE RESEARCH AND DEVELOPMENT CENTER, PROGRESS REPORT,
1983:173-206, 327-330, 370-373. [En] (S542.A8p 1983)
A total of 176 single or multiple crosses were made. An additional light
single crosses were made to incorporate beanfly resistance, and four
backcrosses were made to study the inheritance of resistance to Cercospora leaf
spot. Eight AVRDC breeding lines outyielded the highest yielding check cultivar
V 3476, which produced an average of 2.01 t/ha. High yielding AVRDC lines
showed better disease resistance and larger seed size than did V 3476. The
average yield of 22 entries under no-management conditions was 0.96 t/ha,
compared to 2.20 t/ha under proper management. Of the 238 oreeding lines and 17
accessions evaluated over 3 seasons, 6 breeding lines and one accession (V
4281) were consistently rated as highly resistant to Cercospora leaf spot and
powdery mildew. Flowering was delayed under a 16 hour photoperiod by 0 to 30
days. Segregations in F2 and backcross generations seemed to confirm that the
lobate leaflet character is controlled by a single incompletely dominant gene.
[PLHJ
*0016 Prasad, B.N. 1985. Effect of Metasystox and Cuman-L on -itrogenase
activity in root nodules of Phaseolus mungo. INDIAN JOURNAL OF PLANT
PHYSIOLOGY, v.28(2):204-20b. LEnj [En Abstj (A:PS)
Effects of spraying Metasystox (0.05, 0.08, 0.10 and 0.15%) and Cuman-L
(0.25, 0.50, 0.75 and 1.00%) were studied on in vivo nitrogenase activity in
detached root nodules of blackgram. The enzyme activity was inhibited by 20%
with 0.15% of Metasystox spray on the 7th day after spraying. The plants,
however, showed remarkable recovery. On the other hand, treatments of Cuman-L
had little or no effect on the enzyme activity. [AS]
*0017 Asian Vegetable Research and Development Center. 1987. Nungbean.
ASIAN VEGETABLE RESEARCH AND DEVELOPMENT CENTER, PROGRESS REPORT,
1984:165-199, 305-307. (S542.A~p 1984)
A total of 119 mungbean and 65 blackgram accessions were received from
Pakistan. Sixty-one mungbean accessions from Pakistan were found to be
moderately resistant to powdery mildew (PM). Selections with yield potential of
3 t/ha and resistance to Cercospora leaf spot (CLS) and PM were identified. A
2-year study confirmed that genotypes with a yield of more than I t/ha under
minimum input are available. Majority of AVRDC breeding lines were less
sensitive to photoperiod. Five lines had high yield potential combined with
high level of resistance to CLS or PM. A total of 222 accessions were screened
for resistance to beanflies. V 1160, a Vigna radiata var glabratum, was the
least damaged entry. A total of 113 lines, interspecific hybrids and parents,
were screened for resistance to Callosobruchus chinensis. V 4997 was selected
to confirm its resistance to bruchid. A total of 19 accessions were tested for
their reaction to the unknown mungbean virus isolates. All of them were
susceptible. The unknown virus is not BCMV or a strain of it. The host range of
the isolates was restricted to leguminous crops. All 117 entries, 48 advance
lines, 64 lines and accessions previously reported as resistant and 5
susceptible checks were screened in greenhouse for resistance to PM. A total of
29 accessions and 26 lines were immune. [THH
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